https://scholars.lib.ntu.edu.tw/handle/123456789/571826
Title: | Walker circulation response to extratropical radiative forcing | Authors: | Kang S.M Xie S.-P Shin Y Kim H YEN-TING HWANG Stuecker M.F Xiang B Hawcroft M. |
Keywords: | Atmospheric radiation; Oceanography; Radiative Cooling; Tropics; Climate model simulations; Cloud radiative effects; Eastern equatorial Pacific; Intertropical convergence zone; Radiative forcings; Subsurface waters; Tropical atmospheres; Walker circulation; Climate models | Issue Date: | 2020 | Journal Volume: | 6 | Journal Issue: | 47 | Source: | Science Advances | Abstract: | Walker circulation variability and associated zonal shifts in the heating of the tropical atmosphere have far-reaching global impacts well into high latitudes. Yet the reversed high latitude-to-Walker circulation teleconnection is not fully understood. Here, we reveal the dynamical pathways of this teleconnection across different components of the climate system using a hierarchy of climate model simulations. In the fully coupled system with ocean circulation adjustments, the Walker circulation strengthens in response to extratropical radiative cooling of either hemisphere, associated with the upwelling of colder subsurface water in the eastern equatorial Pacific. By contrast, in the absence of ocean circulation adjustments, the Walker circulation response is sensitive to the forcing hemisphere, due to the blocking effect of the northward-displaced climatological intertropical convergence zone and shortwave cloud radiative effects. Our study implies that energy biases in the extratropics can cause pronounced changes of tropical climate patterns. Copyright ? 2020 The Authors, some rights reserve School of Urban and Environmental Engineering, Ulsan National Institute of Science and Technology, Ulsan, South Korea. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85096814197&doi=10.1126%2fsciadv.abd3021&partnerID=40&md5=872af2be5763f53a533e9e5d881126b0 https://scholars.lib.ntu.edu.tw/handle/123456789/571826 |
ISSN: | 23752548 | DOI: | 10.1126/sciadv.abd3021 | SDG/Keyword: | Atmospheric radiation; Oceanography; Radiative Cooling; Tropics; Climate model simulations; Cloud radiative effects; Eastern equatorial Pacific; Intertropical convergence zone; Radiative forcings; Subsurface waters; Tropical atmospheres; Walker circulation; Climate models |
Appears in Collections: | 大氣科學系 |
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