Atmosphere teleconnections from abatement of China aerosol emissions exacerbate Northeast Pacific warm blob events.

Autor:	Wang H; Key Laboratory of Physical Oceanography and Frontiers Science Center for Deep Ocean Multispheres and Earth System, College of Oceanic and Atmospheric Sciences, Ocean University of China, Qingdao 266100, China., Zheng XT; Key Laboratory of Physical Oceanography and Frontiers Science Center for Deep Ocean Multispheres and Earth System, College of Oceanic and Atmospheric Sciences, Ocean University of China, Qingdao 266100, China., Cai W; Key Laboratory of Physical Oceanography and Frontiers Science Center for Deep Ocean Multispheres and Earth System, College of Oceanic and Atmospheric Sciences, Ocean University of China, Qingdao 266100, China.; Laoshan Laboratory, Qingdao 266237, China.; Centre for Southern Hemisphere Oceans Research, Commonwealth Scientific and Industrial Research Organisation Oceans and Atmosphere, Hobart, TAS 7004, Australia., Han ZW; Key Laboratory of Physical Oceanography and Frontiers Science Center for Deep Ocean Multispheres and Earth System, College of Oceanic and Atmospheric Sciences, Ocean University of China, Qingdao 266100, China., Xie SP; Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA 92093., Kang SM; Max Planck Institute for Meteorology, Hamburg 20146, Germany., Geng YF; Key Laboratory of Physical Oceanography and Frontiers Science Center for Deep Ocean Multispheres and Earth System, College of Oceanic and Atmospheric Sciences, Ocean University of China, Qingdao 266100, China., Liu F; Key Laboratory of Physical Oceanography and Frontiers Science Center for Deep Ocean Multispheres and Earth System, College of Oceanic and Atmospheric Sciences, Ocean University of China, Qingdao 266100, China., Wang CY; Key Laboratory of Physical Oceanography and Frontiers Science Center for Deep Ocean Multispheres and Earth System, College of Oceanic and Atmospheric Sciences, Ocean University of China, Qingdao 266100, China., Wu Y; Key Laboratory of Physical Oceanography and Frontiers Science Center for Deep Ocean Multispheres and Earth System, College of Oceanic and Atmospheric Sciences, Ocean University of China, Qingdao 266100, China., Xiang B; National Oceanic and Atmospheric Administration/Geophysical Fluid Dynamics Laboratory, Princeton, NJ 08540.; University of Corporation for Atmospheric Research, Boulder, CO 80307., Zhou L; School of Oceanography, Shanghai Jiao Tong University, Shanghai 200030, China.; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519082, China.
Jazyk:	angličtina
Zdroj:	Proceedings of the National Academy of Sciences of the United States of America [Proc Natl Acad Sci U S A] 2024 May 21; Vol. 121 (21), pp. e2313797121. Date of Electronic Publication: 2024 May 06.
DOI:	10.1073/pnas.2313797121
Abstrakt:	During 2010 to 2020, Northeast Pacific (NEP) sea surface temperature (SST) experienced the warmest decade ever recorded, manifested in several extreme marine heatwaves, referred to as "warm blob" events, which severely affect marine ecosystems and extreme weather along the west coast of North America. While year-to-year internal climate variability has been suggested as a cause of individual events, the causes of the continuous dramatic NEP SST warming remain elusive. Here, we show that other than the greenhouse gas (GHG) forcing, rapid aerosol abatement in China over the period likely plays an important role. Anomalous tropospheric warming induced by declining aerosols in China generated atmospheric teleconnections from East Asia to the NEP, featuring an intensified and southward-shifted Aleutian Low. The associated atmospheric circulation anomaly weakens the climatological westerlies in the NEP and warms the SST there by suppressing the evaporative cooling. The aerosol-induced mean warming of the NEP SST, along with internal climate variability and the GHG-induced warming, made the warm blob events more frequent and intense during 2010 to 2020. As anthropogenic aerosol emissions continue to decrease, there is likely to be an increase in NEP warm blob events, disproportionately large beyond the direct radiative effects. Competing Interests: Competing interests statement:The authors declare no competing interest.
Databáze:	MEDLINE
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