Abstract
Global mean surface air temperature (SAT) has remained relative stagnant since the late 1990s, a phenomenon known as global warming hiatus. Despite widespread concern and discussion, there is still an open question about whether this hiatus exists, partly due to the biases in observations. The stable isotopic composition of precipitation in mid- and high-latitude continents closely tracks change of the air temperature, providing an alternative to evaluate global warming hiatus. Here we use the long-term precipitation δ18O records available to investigate changes in SAT over the period 1970–2016. The results reveal slight decline in δ18O anomaly from 1998 to 2012, with a slope of −0.000 4‰ decade−1 which is significantly different from that of pre-1998 interval This downward δ18O anomaly trend suggests a slight cooling for about −0.001 oC decade−1, corroborating the recent hiatus in global warming. Our work provides new evidence for recent global warming hiatus and highlights the potential of utilizing precipitation isotope for tracking climate changes.
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Acknowledgments
This work were supported by the China Young 1 000-Talent Program and the National Nature Science Foundation of China (No. 41876039). We acknowledge the Global Network of Isotopes in Precipitation (GNIP) for precipitation stable isotope records (http://www-naweb.iaea.org/napc/ih/IHS_re-sources_isohis.html) and surface temperature anomalies data from Goddard Institute for Space Studies (GISS) dataset (https://data.giss.nasa.gov/gistemp/). The final publication is available at Springer via https://doi.org/10.1007/s12583-019-1239-4.
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Wang, R., Liu, Z. Stable Isotope Evidence for Recent Global Warming Hiatus. J. Earth Sci. 31, 419–424 (2020). https://doi.org/10.1007/s12583-019-1239-4
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DOI: https://doi.org/10.1007/s12583-019-1239-4