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Influence of teleconnection patterns on global moisture transport during peak precipitation month
International Journal of Climatology ( IF 3.9 ) Pub Date : 2022-08-29 , DOI: 10.1002/joc.7843
Marta Vázquez 1 , Raquel Nieto 1 , Margarida L. R. Liberato 2, 3 , Luis Gimeno 1
Affiliation  

Teleconnection patterns are an important feature influencing the variability of moisture transport. This study explores the influence of the Arctic, Antarctic, Pacific-North American, and El Niño–Southern Oscillations on moisture transport from major oceanic and continental moisture sources during the peak precipitation month. The positive phase of the Pacific-North American teleconnection pattern increases the influence of Pacific Ocean moisture on western North America, while the negative phase increases the influence of Atlantic Ocean moisture over eastern North America, with differences between phases higher than 1.5 mm·day−1 over most of the area when the sources are the preferred. The positive phase of the Arctic Oscillation increases the importance of the Mediterranean as a source of moisture for western Europe while the negative phase increases the importance of the North Atlantic as a source with contribution increased in more than 2 mm·day−1 over Europe. The positive phase of the Antarctic Oscillation favours the contribution from the western Indian basin over eastern Africa, while in the negative phase the contribution from the southern Pacific is increased over northwestern Africa. For El Niño–Southern Oscillation, the main influence occurs over South America during El Niño events, increasing the moisture contributions from the South Pacific Ocean over southern South America and from South Atlantic over southeastern Brazil. El Niño events also increase the moisture transport from the North Atlantic over western Europe and from the North Pacific over North America. In contrast, La Niña events increase moisture contributions from the Pacific over Central America and northern South America, being the latter the area when higher differences between phases are observed.

中文翻译:

遥相关模式对降水高峰月全球水汽输送的影响

遥相关模式是影响水分传输可变性的重要特征。本研究探讨了北极、南极、太平洋-北美和厄尔尼诺-南方涛动对降水高峰月份期间主要海洋和大陆水分源水分输送的影响。太平洋-北美遥相关型正相位增加了太平洋水汽对北美西部的影响,负相位增加了大西洋水汽对北美东部的影响,相位差大于1.5 mm·day − 1个当来源是首选时,在大部分地区。北极涛动的正相位增加了地中海作为西欧水汽来源的重要性,而负相位增加了北大西洋作为水汽来源的重要性,贡献增加超过 2 毫米·天−1在欧洲。南极涛动的正相位有利于西印度盆地对东非的贡献,而在负相位,南太平洋对西北非洲的贡献增加。对于厄尔尼诺-南方涛动,主要影响发生在厄尔尼诺事件期间的南美洲,增加了南太平洋对南美洲南部和南大西洋对巴西东南部的水分贡献。厄尔尼诺事件还增加了从北大西洋到西欧和从北太平洋到北美的水分输送。相比之下,拉尼娜事件增加了太平洋对中美洲和南美洲北部的水分贡献,后者是观察到阶段间差异较大的地区。
更新日期:2022-08-29
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