Enhanced Poleward Moisture Transport and Amplified Northern High-Latitude Wetting Trend
Observations and climate change projections forced by greenhouse gas emissions have indicated a wetting trend in northern high latitudes, evidenced by increasing Eurasian Arctic river discharges1, 2, 3. The increase in river discharge has accelerated in the latest decade and an unprecedented, record...
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ftawi:oai:epic.awi.de:31485 2024-09-15T18:02:12+00:00 Enhanced Poleward Moisture Transport and Amplified Northern High-Latitude Wetting Trend Zhang, Xiangdong He, Juanxiong Zhang, Jing Polyakov, Igor Gerdes, Rüdiger Wu, Peili 2012 https://epic.awi.de/id/eprint/31485/ https://hdl.handle.net/10013/epic.40269 unknown Zhang, X. , He, J. , Zhang, J. , Polyakov, I. , Gerdes, R. and Wu, P. (2012) Enhanced Poleward Moisture Transport and Amplified Northern High-Latitude Wetting Trend , Nature Climate Change . doi:10.1038/NCLIMATE1631 <https://doi.org/10.1038/NCLIMATE1631> , hdl:10013/epic.40269 EPIC3Nature Climate Change Article isiRev 2012 ftawi https://doi.org/10.1038/NCLIMATE1631 2024-06-24T04:06:16Z Observations and climate change projections forced by greenhouse gas emissions have indicated a wetting trend in northern high latitudes, evidenced by increasing Eurasian Arctic river discharges1, 2, 3. The increase in river discharge has accelerated in the latest decade and an unprecedented, record high discharge occurred in 2007 along with an extreme loss of Arctic summer sea-ice cover4, 5, 6. Studies have ascribed this increasing discharge to various factors attributable to local global warming effects, including intensifying precipitation minus evaporation, thawing permafrost, increasing greenness and reduced plant transpiration7, 8, 9, 10, 11. However, no agreement has been reached and causal physical processes remain unclear. Here we show that enhancement of poleward atmospheric moisture transport (AMT) decisively contributes to increased Eurasian Arctic river discharges. Net AMT into the Eurasian Arctic river basins captures 98% of the gauged climatological river discharges. The trend of 2.6% net AMT increase per decade accounts well for the 1.8% per decade increase in gauged discharges and also suggests an increase in underlying soil moisture. A radical shift of the atmospheric circulation pattern induced an unusually large AMT and warm surface in 2006–2007 over Eurasia, resulting in the record high discharge. Article in Journal/Newspaper Climate change Global warming Ice permafrost Sea ice Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Nature Climate Change 3 1 47 51 |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Observations and climate change projections forced by greenhouse gas emissions have indicated a wetting trend in northern high latitudes, evidenced by increasing Eurasian Arctic river discharges1, 2, 3. The increase in river discharge has accelerated in the latest decade and an unprecedented, record high discharge occurred in 2007 along with an extreme loss of Arctic summer sea-ice cover4, 5, 6. Studies have ascribed this increasing discharge to various factors attributable to local global warming effects, including intensifying precipitation minus evaporation, thawing permafrost, increasing greenness and reduced plant transpiration7, 8, 9, 10, 11. However, no agreement has been reached and causal physical processes remain unclear. Here we show that enhancement of poleward atmospheric moisture transport (AMT) decisively contributes to increased Eurasian Arctic river discharges. Net AMT into the Eurasian Arctic river basins captures 98% of the gauged climatological river discharges. The trend of 2.6% net AMT increase per decade accounts well for the 1.8% per decade increase in gauged discharges and also suggests an increase in underlying soil moisture. A radical shift of the atmospheric circulation pattern induced an unusually large AMT and warm surface in 2006–2007 over Eurasia, resulting in the record high discharge. |
format |
Article in Journal/Newspaper |
author |
Zhang, Xiangdong He, Juanxiong Zhang, Jing Polyakov, Igor Gerdes, Rüdiger Wu, Peili |
spellingShingle |
Zhang, Xiangdong He, Juanxiong Zhang, Jing Polyakov, Igor Gerdes, Rüdiger Wu, Peili Enhanced Poleward Moisture Transport and Amplified Northern High-Latitude Wetting Trend |
author_facet |
Zhang, Xiangdong He, Juanxiong Zhang, Jing Polyakov, Igor Gerdes, Rüdiger Wu, Peili |
author_sort |
Zhang, Xiangdong |
title |
Enhanced Poleward Moisture Transport and Amplified Northern High-Latitude Wetting Trend |
title_short |
Enhanced Poleward Moisture Transport and Amplified Northern High-Latitude Wetting Trend |
title_full |
Enhanced Poleward Moisture Transport and Amplified Northern High-Latitude Wetting Trend |
title_fullStr |
Enhanced Poleward Moisture Transport and Amplified Northern High-Latitude Wetting Trend |
title_full_unstemmed |
Enhanced Poleward Moisture Transport and Amplified Northern High-Latitude Wetting Trend |
title_sort |
enhanced poleward moisture transport and amplified northern high-latitude wetting trend |
publishDate |
2012 |
url |
https://epic.awi.de/id/eprint/31485/ https://hdl.handle.net/10013/epic.40269 |
genre |
Climate change Global warming Ice permafrost Sea ice |
genre_facet |
Climate change Global warming Ice permafrost Sea ice |
op_source |
EPIC3Nature Climate Change |
op_relation |
Zhang, X. , He, J. , Zhang, J. , Polyakov, I. , Gerdes, R. and Wu, P. (2012) Enhanced Poleward Moisture Transport and Amplified Northern High-Latitude Wetting Trend , Nature Climate Change . doi:10.1038/NCLIMATE1631 <https://doi.org/10.1038/NCLIMATE1631> , hdl:10013/epic.40269 |
op_doi |
https://doi.org/10.1038/NCLIMATE1631 |
container_title |
Nature Climate Change |
container_volume |
3 |
container_issue |
1 |
container_start_page |
47 |
op_container_end_page |
51 |
_version_ |
1810439628810878976 |