气候变化领域集成服务门户(CCPortal): Rossby wave propagation from the arctic into the midlatitudes: Does it arise from in situ latent heating or a trans-arctic wave train?

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DOI	10.1175/JCLI-D-18-0780.1
	Rossby wave propagation from the arctic into the midlatitudes: Does it arise from in situ latent heating or a trans-arctic wave train?
	Gong T.; Feldstein S.B.; Lee S.
发表日期	2020
ISSN	0894-8755
起始页码	3619
结束页码	3633
卷号	33 期号:9
英文摘要	The relationship between latent heating over the Greenland, Barents, and Kara Seas (GBKS hereafter) and Rossby wave propagation between the Arctic and midlatitudes is investigated using global reanalysis data. Latent heating is the focus because it is the most likely source of Rossby wave activity over the Arctic Ocean. Given that the Rossby wave time scale is on the order of several days, the analysis is carried out using a daily latent heating index that resembles the interdecadal latent heating trend during the winter season. The results from regression calculations find a trans-Arctic Rossby wave train that propagates from the subtropics, through the midlatitudes, into the Arctic, and then back into midlatitudes over a period of about 10 days. Upon entering the GBKS, this wave train transports moisture into the region, resulting in anomalous latent heat release. At high latitudes, the overlapping of a negative latent heating anomaly with an anomalous high is consistent with anomalous latent heat release fueling the Rossby wave train before it propagates back into the midlatitudes. This implies that the Rossby wave propagation from the Arctic into the midlatitudes arises from trans-Arctic wave propagation rather than from in situ generation. The method used indicates the variance of the trans-Arctic wave train, but not in situ generation, and implies that the variance of the former is greater than that of latter. Furthermore, GBKS sea ice concentration regression against the latent heating index shows the largest negative value six days afterward, indicating that sea ice loss contributes little to the latent heating. © 2020 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy
英文关键词	Heating; Latent heat; Ocean currents; Sea ice; Wave propagation; High Latitudes; Latent heat release; Negative values; Rossby wave activity; ROSSBY wave propagation; Sea ice concentration; Situ generation; Winter seasons; Mechanical waves; latent heat flux; midlatitude environment; polar region; Rossby wave; sea ice; wave field; wave propagation; Arctic; Arctic Ocean; Barents Sea; Greenland Sea; Kara Sea; Norwegian Sea
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171329
作者单位	CAS Key Laboratory of Ocean Circulation and Waves, Institute of Oceanology, Chinese Academy of Sciences, and Pilot National Laboratory for Marine Science and Technology (Qingdao), Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, China; Department of Meteorology and Atmospheric Science, Pennsylvania State University, University Park, PA, United States
推荐引用方式 GB/T 7714	Gong T.,Feldstein S.B.,Lee S.. Rossby wave propagation from the arctic into the midlatitudes: Does it arise from in situ latent heating or a trans-arctic wave train?[J],2020,33(9).
APA	Gong T.,Feldstein S.B.,&Lee S..(2020).Rossby wave propagation from the arctic into the midlatitudes: Does it arise from in situ latent heating or a trans-arctic wave train?.Journal of Climate,33(9).
MLA	Gong T.,et al."Rossby wave propagation from the arctic into the midlatitudes: Does it arise from in situ latent heating or a trans-arctic wave train?".Journal of Climate 33.9(2020).