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Climate change related processes affecting mountaineering itineraries, mapping and application to the Valais Alps (Switzerland) Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2022-04-25 Jacques Mourey,Ludovic Ravanel,Christophe Lambiel
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Assessment of the TREELIM model in predicting present treeline along a longitudinal continentality-maritimity gradient in south-western Norway Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2022-04-25 Jasmine Byrne,Hans Renssen,Dieu Tien Bui,Arvid Odland
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A combination of cosmogenic and Schmidt hammer exposure dating in the study of the deglaciation timing of Sierra de Guadarrama National Park (Spain) Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2022-04-06 Javier de Marcos,José Úbeda,Nuria Andrés,David Palacios
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Late Holocene glaciers in western Scotland? Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2022-03-16 Stephan Harrison,Ann V. Rowan,Adrian R. Dye,Mitchell A. Plummer,Karen Anderson
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Glaciotectonic disintegration of roches moutonnées during glacial ripping in east Sweden Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2022-01-02 M. Krabbendam,A. M. Hall,R. M. Palamakumbura,A. Finlayson
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Flow velocities of the debris-covered Miyar Glacier, western Himalaya, India Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2021-12-30 Suresh Das,Milap Chand Sharma,Katie E. Miles
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Fluvial transport in the deglaciated Antarctic catchment – Bohemian Stream, James Ross Island Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2021-12-01 Jan Kavan
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Mass wasting and erosion in different morphoclimatic zones of the Makalu Barun region, Nepal Himalaya Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2021-10-02 Jan Kalvoda,Adam Emmer
ABSTRACT Mountain regions of the world face unprecedented climate-induced changes and associated sustainable development challenges. Retreating glaciers, degrading permafrost and rapid mass movements on the one hand and glacier-related disasters, on the other hand, are the sentinels of these phenomena. In this study, we focus our attention on the Makalu Barun region in the Nepal Himalaya, and characterize
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The glacier–rock glacier mountain landsystem: an example from North Iceland Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2021-10-02 W. Brian Whalley
ABSTRACT A valley floor rock glacier in Nautárdalur, eastern Tröllaskagi, northern Iceland, has been investigated since the 1970s. Adjacent valleys are also examined as mountain landsystems. The methodology identifies ‘landform elements’ (features evident on slopes) on transects that can be identified and mapped from Google Earth imagery. Transects can be compared to show similarities and differences
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Current understanding of groundwater recharge and groundwater drought in Sweden compared to countries with similar geology and climate Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2021-09-06 Roland Barthel,Moa Stangefelt,Markus Giese,Michelle Nygren,Kristina Seftigen,Deliang Chen
ABSTRACT Recently, groundwater in Sweden has attracted media attention due to supply shortages caused by dry periods and low groundwater levels. About half of Swedish drinking water stems from groundwater. The small Swedish aquifers are highly dependent on frequent and sufficient recharge. Groundwater recharge forms the link between meteorological and groundwater drought and thus the main link between
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From deglaciation to postglacial filling: post-LGM evolution of an isolated glacier system at the northern fringe of the Eastern Alps (Austria) Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2021-07-31 Heidi Bernsteiner,Joachim Götz,Bernhard C. Salcher,Andreas Lang
ABSTRACT During the last glacial maximum (LGM), large parts of the European Alps were occupied by an extensive interconnected system of valley glaciers. At lower elevations on the eastern fringe of the Alps, only a patchy pattern of isolated glaciers developed. Erosion by many of these smaller glaciers was however sufficient to excavate subglacial basins (‘overdeepening’) large enough to act as sedimentary
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Evidence of glacier-permafrost interactions associated with hydro-geomorphological processes and landforms at Snøhetta, Dovrefjell, Norway Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2021-07-03 Floreana Miesen,Svein Olaf Dahl,Lothar Schrott
ABSTRACT Glacier-permafrost interactions are investigated to understand glacial-hydrological influence along a partly glacierised valley on the NE flank of the Snøhetta massif, Dovrefjell, southern Norway. Of particular interest is how processes are controlled by a hydrological connection between landforms. Field mapping identified an ice-marginal landsystem comprising a polythermal glacier, a proglacial
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Effects of terrain on the occurrence of debris flows after forest harvesting Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2021-06-01 Fumitoshi Imaizumi,Roy C. Sidle
ABSTRACT Forest harvesting and subsequent forest regeneration represent widespread changes in land cover in mountain regions. Although impacts of forest harvesting on landslide initiation has been widely reported, the effects of forest harvesting on the occurrence of debris flows remains unclear. We propose that forest harvesting will differentially affect the susceptibility of debris flows amongst
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The role of an ice-sheet, glacioisostatic movements and climate in the transformation of Middle Pleistocene depositional systems: a case study from the Reda site, northern Poland Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2021-06-01 Robert J. Sokołowski,Anatoly Molodkov,Anna Hrynowiecka,Barbara Woronko,Paweł Zieliński
ABSTRACT This study provides a new stratigraphic and palaeogeographic scheme for the time span between Marine Isotope Stages (MISs) 8 and 6. Based on detailed sedimentological and palynological studies, the roles of the Scandinavian Ice Sheet (SIS) advances and changing climate in the evolution of sedimentary environments is considered. At the Reda site, northern Poland, vertically stacked, 25 m thick
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Periglacial landforms in the high Drakensberg, Southern Africa: morphogenetic associations with rock weathering rinds and shrub growth patterns Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2021-01-11 Stefan Grab,Jasper Knight,Lisa Mol,Tamara Botha,Clinton Carbutt,Stephan Woodborne
ABSTRACT Here, we aim to establish possible morphogenetic associations between periglacial phenomena (sorted circles and turf-/stone-banked lobes) by examining (a) rock surface weathering rinds by thin section microscopy and SEM-EDX analysis, and (b) alpine shrub growth patterns of Helichrysum trilineatum supported by AMS 14C age determination. The study area is the Mafadi–Njesuthi summit zone, one
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High mountain rockfall dynamics: rockfall activity and runout assessment under the aspect of a changing cryosphere Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2021-01-02 Bettina Knoflach,Hannah Tussetschläger,Rudolf Sailer,Gertraud Meißl,Johann Stötter
ABSTRACT Rockfalls are a major aspect concerning morphodynamics in high mountain areas and represent a serious hazard for people and infrastructure. Recently, an increase of rockfall activity has been observed which is probably related to the destabilization of rock slopes through climate-related changes of the mountain cryosphere. This study investigates the rockfall distribution during a 4-year monitoring
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Is ice in the Himalayas more resilient to climate change than we thought? Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2021-01-02 Stephan Harrison,Darren Jones,Karen Anderson,Sarah Shannon,Richard A. Betts
ABSTRACT In the Himalaya, climate change threatens mountain water resources as glaciers melt and changes in runoff and water availability are likely to have considerable negative impacts on ecological and human systems. While much has been written on the effect of climate change on glaciers in the Himalaya and its impact on sustainability, almost nothing has been published on rock glaciers in the region
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Migrating boulders on the surface of Alpine valley glaciers Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2020-12-20 Jürg Alean,Lea Schwendener,Michael Zemp
ABSTRACT Boulders in the ablation areas of Alpine valley glaciers were found to not travel along with the ice in a passive manner only. Many show an additional but smaller component of movement towards the south. We investigate this phenomenon and its governing processes using field observations and measurements from terrestrial and aerial photographs of glaciers in the Swiss Alps. We found that large
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Summer mean temperature reconstruction during the past 285 years based on tree-ring in northern Gaoligong Mountains, northwestern Yunnan of China Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2020-12-08 Yijin Zhao,Maierdang Keyimu,Zongshan Li,Yongzhe Chen,Jingshu Wei,Xiaochun Wang,Zexin Fan
ABSTRACT Historical temperature reconstructions enable us to understand the long-term thermal variation feature of a region. We developed a tree-ring width chronology of the coniferous species Tsuga dumosa (D. Don) Eichler (Himalayan Hemlock) growing in the northern Gaoligong Mountains, northwestern Yunnan province of China. The climate-tree growth relationship analysis indicated that summer mean temperature
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Morphological changes to the terminus of a maritime glacier during advance and retreat phases: Fox Glacier/Te Moeka o Tuawe, New Zealand Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2020-11-29 Heather Purdie,Paul Bealing,Christopher Gomez,Brian Anderson,Oliver J. Marsh
ABSTRACT Fox Glacier/Te Moeka o Tuawe is a fast-responding maritime glacier that has undergone multiple advance and retreat phases during recent decades. Here we use a combination of repeat photography, Structure from Motion (SfM), and ice discharge measurement, to identify key morphological differences associated with these repeated phase changes, and assess how much of the current terminus is still
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Hydroclimate changes over Sweden in the twentieth and twenty-first centuries: a millennium perspective Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2020-11-17 Deliang Chen,Peng Zhang,Kristina Seftigen,Tinghai Ou,Markus Giese,Roland Barthel
ABSTRACT Climate change poses additional risks for natural and human systems including the hydrological cycle, leading to altered temporal and spatial variation of hydroclimatic conditions. This work assessed the current understanding of the dryness and wetness conditions in Sweden over the last two millenniums based on proxy and instrumental data, as well as climate model simulations and projections
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Uncertainties on the GIS based potential natural vegetation simulation using Comprehensive and Sequential Classification System Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2020-10-19 Yinfang Shi,Jun Zhao,Peter Grace,Chuanhua Li,Jinglan Zhang,Huaiyu Du
ABSTRACT The use of GIS-based ecological models is increasing and the accuracy of input datasets of these models is improving. Still, there is a significant gap in quantifying the uncertainty related to the input data and the accuracy of these models’outputs. This study quantified error in annual cumulative temperature derived from using daily mean temperature and monthly mean temperature, and the
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Applications of glacial geomorphological and lichenometric studies for reconstructing the Late Holocene glacial history of the Hoksar valley, Kashmir Himalaya, India Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2020-09-25 Khalid Omar Murtaza,Shakil Ahmad Romshoo
ABSTRACT In this study, the lichenometry studies of the Hoksar Glacier valley in Kashmir Himalaya, India supported by the extensive ground- and remote sensing-based glacial geomorphological mapping enabled the identification of the six episodes of glacier advances in the valley. Field-based geomorphologic evidence suggests that the glacial episode 1 (GEI) experienced the most extensive glaciation in
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The roles of agriculture and climate in land degradation in southeast Iceland AD 1700–1900 Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2020-09-14 Friðþór Sófus Sigurmundsson,Guðrún Gísladóttir,Egill Erlendsson
ABSTRACT Past human land-use is increasingly recognized as a driver of ecosystem change in seemingly natural landscapes. Quantification of historical land use is therefore critical for assessing the degree of human impact and requires integration of geography, ecology and history. This paper examines the impact of climate change, land-use and exposure to international markets on the terrestrial ecology
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Multi-decadal dating of surface slope movements in forested DSGSD areas of the European Alps: detecting precipitation triggering factors Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2020-09-10 G. Leonelli,A. Chelli,M. Consonni,C. Lorenzo,P. Gattinoni
ABSTRACT An integrated approach including dendrometric and dendrogeomorphological analysis, geotechnical monitoring and numerical modeling was established on a reactivating landslide in a forested Deep-Seated Gravitational Slope Deformation (DSGSD) area in Valtellina, Italy, in order to define the distribution of surface displacements in space and time as well as to identify the triggering factors
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The Raunis section, central Latvia, revisited: first luminescence results and re-evaluation of a key Baltic States stratigraphic site Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2020-09-08 Edyta Kalińska,Helena Alexanderson,Māris Krievāns
ABSTRACT In interstadial deposits, sand interbeds gain limited consideration in comparison with organic sediments, and therefore tend to be underrepresented in paleoenvironmental reconstructions. The Raunis site, central-eastern Latvia, is an example where organic beds have already gained some attention and been used to understand the complex interactions between advance and retreat of the Scandinavian
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Distribution and characteristics of rock glaciers in the Balkan Peninsula Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2020-08-24 Brigitte Magori,Petru Urdea,Alexandru Onaca,Florina Ardelean
ABSTRACT Little information exists regarding the geomorphologic characteristics, spatial distribution and genesis and activity of rock glaciers in the Balkan Peninsula. A total of 224 rock glaciers were identified in four major mountainous regions (Dinaric Alps, Rila and Pirin, North Macedonia, Pindus and Parnassus), covering a total of 16.74 km2. Most of the rock glaciers are considered relict and
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Diverse climate sensitivities in Picea crassifolia and Juniperus przewalskii promote different responses to climate warming in Qilian Mountains, northwest China Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2020-08-04 Yilin Ran,Lingnan Zhang,Rui Wang,Shoudong Zhao,Xiaohong Liu
ABSTRACT The effects of climate warming are widely recognized; however, some studies have suggested that the rate of warming has slowed since the end of the twentieth century. However, the relationships between climate and the radial growth of trees during different periods of climate change have yet to be investigated fully. In the present study, tree-ring core samples were collected from Picea crassifolia
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Introduction to the special issue on ‘Tree rings, Environment and Tropical Forests’ Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2020-07-02 Hans W. Linderholm
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Tree-ring minimum density chronologies of Picea schrenkiana along an elevation gradient in the Tien Shan Mountains, China Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2020-07-02 Shulong Yu,Tongwen Zhang,Shengxia Jiang,Ruibo Zhang,Li Qin,Huaming Shang,Heli Zhang
ABSTRACT We selected four sampling areas to collect tree-ring samples along an elevation gradient on north-facing slopes in three regions of the Tien Shan Mountains. Samples were collected at sites located at intervals of about 100 m.a.s.l. in each sampling area. For all sampling sites, the mean tree age, mean sensitivity, and standard deviation of the minimum density chronologies were associated with
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Drought reconstruction based on tree-ring earlywood of Picea obovata Ledeb. for the southern Altay Mountains Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2020-06-17 Shengxia Jiang,Tongwen Zhang,Yujiang Yuan,Shulong Yu,Huaming Shang,Ruibo Zhang
ABSTRACT In this study, a 177-year April–June Palmer Drought Severity Index (PDSI) for the southern slopes of the Altay Mountains (China) was reconstructed based on the earlywood width of 96 Siberian spruce (Picea obovata Ledeb.) samples located at eight different sites. The reconstructed PDSI tracked the observed data well (r = 0.723, p < .0001, n = 52). This PDSI reconstruction captures some drought
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Radial growth response of Pinus tabulaeformis to temperature during the growth season in southeastern Gansu, China Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2020-06-14 Guang Bao,Yu Liu,Na Liu,Hongtao Wang
ABSTRACT Tree-ring chronologies of Pinus tabulaeformis from three sampling sites in southeastern Gansu Province in China and growth-related parameters calculated from daily average temperatures were utilized to explore the response features of tree radial growth to onset and cessation date, duration and accumulated temperature. The results indicated that the three chronologies exhibited a significantly
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Glacial ripping: geomorphological evidence from Sweden for a new process of glacial erosion Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2020-06-05 Adrian M. Hall,Maarten Krabbendam,Mikis van Boeckel,Bradley W. Goodfellow,Clas Hättestrand,Jakob Heyman,Romesh N. Palamakumbura,Arjen P. Stroeven,Jens-Ove Näslund
ABSTRACT In low relief Precambrian gneiss terrain in eastern Sweden, abraded bedrock surfaces were ripped apart by the Fennoscandian Ice Sheet. The resultant boulder spreads are covers of large, angular boulders, many with glacial transport distances of 1–100 m. Boulder spreads occur alongside partly disintegrated roches moutonnées and associated fracture caves, and are associated with disrupted bedrock
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Different responses of the radial growth of the planted and natural forests to climate change in humid subtropical China Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2020-06-01 Maowei Bai,Zhipeng Dong,Dai Chen,Huaizhou Zheng,Feifei Zhou,Xinguang Cao,Tinghai Ou,Keyan Fang
ABSTRACT China holds the world’s largest area of planted forests, which play a crucial role in mitigating climate change. Knowledge gaps remain on the responses of the growth of planted forests to climate changes in China, particularly for their long-term changes. This study compared the long-term tree-ring growth patterns and their responses to climate between planted and natural forests. We developed
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A 475-year tree-ring-width record of streamflow for the Qingshui River originating in the southern slope of the central Tianshan Mountains, China Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2020-06-01 Tongwen Zhang,Huaming Shang,Yuting Fan,Shulong Yu,Ruibo Zhang,Li Qin,Shengxia Jiang
ABSTRACT We reconstructed the streamflow of the Qingshui River, which originates from the southern slopes of the central Tianshan Mountains in western China. The correlation between the hydrometeorological data and the tree-ring chronology indicated that the influences of temperature and precipitation on the radial growth of spruces were contrary in the different periods of the growth and non-growth
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Hydroclimate variations in the Northern China Plain and their possible socio-cultural influences Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2020-05-26 Yingnan Pan,Qiang Li,Yu Liu,Ruoshi Liu,Ruolan Deng
ABSTRACT The Northern China Plain is China’s traditional and important agricultural production base, where climate change in the past has significantly affected China in many aspects such as national agricultural policies, ecological construction and foreign trade exchanges. High-resolution paleoclimatology research reveals that the precipitation, relative humidity, and drought index in this area have
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Climatic factors of radial growth of Pinus tabulaeformis in eastern Gansu, northwest China based on Vaganov–Shashkin model Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2020-05-18 Maili Wu,Na Liu,Guang Bao,Jin Gao
ABSTRACT Compared with traditional research methods, research based on physiological processes could provide more interactions between the radial growth of trees and climate factors. The Vaganov–Shashkin model (VS-oscilloscope) was applied to simulate tree-ring formation in semi-arid eastern Gansu, China and its response to climate variables during the past several decades. Three simulated tree-ring
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Early growing-season precipitation drives radial growth of alpine juniper shrubs in the central Himalayas Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2020-05-14 Jayram Pandey,Shalik Ram Sigdel,Xiaoming Lu,Franco Salerno,Binod Dawadi,Eryuan Liang,Jesús Julio Camarero
ABSTRACT Shrubs growing at higher latitudes and altitudes are considered to be highly sensitive to climate warming. In particular, alpine shrubs are potential climate proxies for understanding responses of high-elevation treeless ecosystems to warmer conditions. However, little is known about how alpine shrub radial growth responds to climate variables, specifically temperature and precipitation. This
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Temperature variations extracted from ring widths of firs growing in the humid environment of the mid-Qinling Mountains Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2020-05-13 Bo Sun,Yu Liu,Ying Lei,Yongyong Ma,Changfeng Sun
ABSTRACT In comparison to trees that grow in arid areas, those growing in humid areas usually have ambiguous climatic information recorded in their ring widths. In this study, ring width samples of Abies chensiensis, collected from the headwaters of the Jialing River in the mid-Qinling Mountains, were used to investigate if temperature signals from the ring widths of trees in humid areas can be extracted
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Tree-ring record of winter temperature from Humla, Karnali, in central Himalaya: a 229 years-long perspective for recent warming trend Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2020-04-23 Narayan Prasad Gaire,Ze-Xin Fan,Santosh K. Shah,Uday Kunwar Thapa,Maan Bahadur Rokaya
ABSTRACT Tree rings are widely used to reconstruct past climates in regions where observational records of climate are short. In this study, we developed a 294 years-long (1718–2011 CE) ring-width chronology of the Himalayan Silver fir (Abies spectabilis (D.Don, Spach)) from Humla district in western Nepal to reconstruct winter minimum temperature for the remote region of central Himalaya where instrumental
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Gruben glacier and rock glacier, Wallis, Switzerland: glacier ice exposures and their interpretation Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2020-04-02 W. Brian Whalley
ABSTRACT Field observations, map analysis and the use of terrestrial and aerial photography and Google Earth show that the Gruben rock glacier, discussed in the literature since 1974, does contain a glacier ice core. Mapped as bare glacier ice at the time of the first map, about AD 1850, subsequent cover by debris from the surrounding cliffs has preserved what is now a slow-moving glacier core beneath
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Snow-avalanche boulder fans in Jotunheimen, southern Norway: Schmidt-hammer exposure-age dating, geomorphometrics, dynamics and evolution Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2020-04-02 John A. Matthews,Stefan Haselberger,Jennifer L. Hill,Geraint Owen,Stefan Winkler,John F. Hiemstra,Helen Hallang
ABSTRACT Eleven snow-avalanche boulder fans were dated from two high-alpine sites in Jotunheimen using Schmidt-hammer exposure-age dating (SHD) and lichenometry. Average exposure ages of the surface boulders ranged from 2285 ± 725 to 7445 ± 1020 years and demonstrate the potential of SHD for dating active landforms and diachronous surfaces. Application of GIS-based morphometric analyses showed that
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Micro-Scale isotopic analysis of ice facies frozen from supercooled water Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2020-04-02 Connor J. Shiggins,Matthew R. P. Harris,Peter G. Knight,Christopher J. Fogwill
ABSTRACT Subglacial glaciohydraulic supercooling can form basal ice and affect glacier dynamics, sediment transfer and geomorphology. Whilst isotopic analysis (δ18O-δD) of basal ice has demonstrated the significance of supercooling, questions remain as to what extent the identification of supercooling depends on sampling resolution. We conducted laboratory experiments in which ice was frozen from supercooled
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Spatial and temporal analysis of debris flow occurrence in three adjacent basins of the western margin of Grande River: Quebrada de Humahuaca, Jujuy, Argentina Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2020-04-02 María Yanina Esper Angillieri,Laura Perucca,Nicolás Vargas
ABSTRACT Numerous slides, rock falls and flows occur in the arid mountainous areas of northwestern Argentina. On 10 January 2017, torrential rain caused the acceleration of large-scale and slow-moving landslides mainly in the Los Filtros basin and it produces important damage in the Volcán village causing fatalities, dozens of evacuees and great economic losses, with the total destruction of buildings
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Diatom assemblages from short-lived jökulhlaup-formed kettle lakes in a proglacial outwash plain, south-east Iceland Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2020-04-02 Antonia C. Law,Zoe Robinson,Katie Szkornik,Richard I. Waller
ABSTRACT Little is known about the ecological implications of high-magnitude, low frequency jökulhlaup events in proglacial systems. This study highlights how kettle lakes produced by jökulhlaups in proglacial areas create short-lived ecosystems and increase biodiversity. This research also demonstrates that as ice-margins retreat, creating new proglacial lakes and aquatic habitats, these sites may
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Long-term frost weathering rates of limestone beach clasts, Fårö Island, Central Baltic Sea Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2020-01-02 Jan Boelhouwers,Charlotta Andersson,Rikard Berg,Razia Asad Kandastar,Alfons Sjöman,Elin Vainionpää Lindgren
ABSTRACT The known post-glacial isostatic land rise rates at Fårö Island, Central Baltic Sea, allowed for the reliable estimation of frost weathering rates of limestone clasts along five beach profiles. Weathering rates measured by clast dimension change were quantified over periods ranging between 640 and 2090 years. While the deposited beach materials at each profile have varying lithostratigraphic
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The major landforms of the bedrock of Sweden – with a view on the relationships between physical geography and geology Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2020-01-02 Karna Lidmar-Bergström
ABSTRACT This paper presents the result of my research in Sweden and my view on the relationships between physical geography (here mainly geomorphology) and geology. I developed a method for identification and mapping denudation surfaces formed in the Precambrian basement. South Sweden turned out to be a key area with cover rocks of different age directly on the basement. The relief differences in
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Environment and climate change during the late Holocene in Hjaltadalur, Skagafjörður, northern Iceland Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2020-01-02 Magnus Hellqvist,Martina Hättestrand,Elin Norström,Elisabeth Almgren,Jenny N. Johansson,Ragnheiður Traustadóttir
ABSTRACT We present an overview of the local environmental development of the valley of Hjaltadalur, situated in Skagafjörður, northern Iceland. The aim of this study is to increase the knowledge about the valley region before and during human settlement in the ninth century. Four mires were investigated after which the Viðvík peat bog was selected as the main site for evaluating changes in climate
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Early twentieth century evolution of Ferdinand glacier, Svalbard, based on historic photographs and structure-from-motion technique Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2020-01-02 Jan Kavan
ABSTRACT Glaciers in central Svalbard are retreating since their Little Ice Age maximum, dated in the area to around 1900. Past areal extent of glaciers can confidently be reconstructed based on end moraine position. However, reconstructions of thickness and volume of glaciers remain relatively more complicated and uncertain. In this study, past changes in thickness and volume of the Ferdinand Glacier
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Boulder barricades in an emerging hypertidal environment: the case of Ungava Bay, northern Quebec, Canada Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2020-01-02 Antoine Boisson,Michel Allard
ABSTRACT Boulder barricades are poorly documented Holocene coastal landforms of Arctic and Subarctic regions. To understand the terrain factors and coastal processes explaining the occurrences of boulder barricades, we mapped and described these periglacial landforms along the emerging hypertidal coast of Ungava Bay, in Nunavik, northern Quebec, Canada. This study examines the spatial distribution
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Evolution of the largest glacier in Mexico (Glaciar Norte) since the 50s: factors driving glacier retreat Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2019-10-02 Jorge Cortés-Ramos,H. Delgado-Granados,C. Huggel,G. Ontiveros-González
ABSTRACT The evolution of Mexican glaciers (19° N) in the climate context is poorly understood despite these glaciers are important indicators of regional climate change. The detailed patterns of glacier recession since the Little Ice Age (LIA) have exacerbated during the past years and decades. Their relationship to local and regional climate change needs further analysis. This study compares the
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Proglacial icings as indicators of glacier thermal regime: ice thickness changes and icing occurrence in Svalbard Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2019-10-02 Laura Mallinson,Darrel A. Swift,Andrew Sole
ABSTRACT Proglacial icings (also known as naled or aufeis) are frequently observed in the forefields of polar glaciers. Their formation has been ascribed to the refreezing of upwelling groundwater that has originated from subglacial melt, and thus the presence of icings has been used as evidence of polythermal glacier regime. We provide an updated analysis of icing occurrence in Svalbard and test the
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Controlling factors of microclimate in blocky surface layers of two nearby relict rock glaciers (Niedere Tauern Range, Austria) Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2019-09-28 Thomas Wagner,Marcus Pauritsch,Cyril Mayaud,Andreas Kellerer-Pirklbauer,Felix Thalheim,Gerfried Winkler
ABSTRACT Coarse blocky material is known to have a ground cooling effect compared to other types of unconsolidated surface material, which may have an influence on spatial distribution and conservation of permafrost. In the light of climate warming, this effect may retard permafrost degradation or exert prolonged ground cooling in general. To contribute to a better understanding of this ground cooling
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Comparative numerical surface exposure-age dating (10Be and Schmidt hammer) of an early-Holocene rock avalanche at Alstadfjellet, Valldalen, southern Norway Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2019-08-21 Peter Wilson,Henriette Linge,John A. Matthews,Richard W. Mourne,Jesper Olsen
ABSTRACT Application of calibrated Schmidt-hammer surface-exposure dating (SHD) to the run-out debris of a rock avalanche at Alstadfjellet, Valldalen, southern Norway, has yielded ages that are consistent within uncertainties with terrestrial cosmogenic 10Be surface-exposure ages for the debris. SHD calibration was based on young and old control sites that were, respectively, recent road cuts / rockfall
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Micro-weathering of limestone surfaces in a foreland of Hallstätter Glacier (Dachstein, Austria) Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2019-07-03 Maciej Dąbski,Barbara Woronko,Patrycja Fabijańska,Jan-Christoph Otto
ABSTRACT Since the end of LIA climatic amelioration results in retreat of glaciers worldwide and the development of glacial forelands with freshly abraded rock surfaces undergoing weathering. When the timing of glacier retreat is known, glacier forelands are highly valuable study sites to investigate initial and short-term weathering processes. The aim of this study is to quantify limestone surface
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The glacial landsystem of Hoffellsjökull, SE Iceland: contrasting geomorphological signatures of active temperate glacier recession driven by ice lobe and bed morphology Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2019-07-03 David J. A. Evans,Marek W. Ewertowski,Chris Orton
ABSTRACT A 1:14 500 scale glacial geomorphology and surficial geology map of the foreland of Hoffellsjökull, southeast Iceland is used to assess the glacial landsystem signature of the contrasting glacier-climate interactions of two separate flow lobes within one outlet glacier. This constitutes a valuable modern analogue for employing glacial geomorphological signatures as palaeoclimate indicators
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Testing lichenometric techniques in the production of a new growth-rate (curve) for the Breiðamerkurjökull foreland, Iceland, and the analysis of potential climatic drivers of glacier recession Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2019-06-30 David J. A. Evans,Snævarr Guðmundsson,Jonathan L. Vautrey,Kate Fearnyough,W. Gerard Southworth
ABSTRACT Independent dating of closely-spaced moraines on the west Breiðamerkurjökull foreland is used to test the accuracy of the size frequency (SF) and largest lichen (5LL) lichenometric dating techniques. The 5LL technique derived the most accurate ages for three undated moraines within the dated sequence but growth rates and lag times produced by the two methods (5LL = 0.71 mm yr−1 and 11 years;
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Impacts of land abandonment and climate variability on runoff generation and sediment transport in the Pisuerga headwaters (Cantabrian Mountains, Spain) Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2019-04-09 Alfonso Pisabarro,Ramón Pellitero,Enrique Serrano,Juan Ignacio Lopez-Moreno
ABSTRACT The Atlantic mountains of Spain are suffering a strong landscape change due to a widespread and intensive emigration to urban areas since the 1950s. This process, representative of global developments in an imminent future, is dominated by urban societies and leads to deep landscape changes in which crop fields and grasslands are abandoned and progressively covered by forest and shrubs. These
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Constraining 135 years of mass balance with historic structure-from-motion photogrammetry on Storglaciären, Sweden Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2019-03-26 Erik S. Holmlund,Per Holmlund
ABSTRACT Geodetic volume estimates of Storglaciären in Sweden suggest a 28% loss in total ice mass between 1910 and 2015. Terrestrial photographs from 1910 of Tarfala valley, where Storglaciären is situated, allow for an accurate reconstruction of the glacier's surface using Structure-from-Motion photogrammetry, which we used for past volume and mass estimations. The glacier's yearly mass balance gradient
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Estimating daily average net radiation in Northern Mongolia Geogr. Ann. Ser. A Phys. Geogr. (IF 1.5) Pub Date : 2019-02-27 Munkhdavaa Munkhjargal,Lucas Menzel
ABSTRACT Net radiation is a key component of surface radiation balance and has a strong influence on hydrological processes via evapotranspiration. In this study, daily average net radiation (Rnmean) for all-sky conditions was investigated as a function of the estimated daily average global radiation (GRmean) during the summers of 2011 and 2012 (128 days total) in the Sugnugur Valley of Northern Mongolia