气候变化领域集成服务门户(CCPortal): Climate Extremes across the North American Arctic in Modern Reanalyses

CCPortal

DOI	10.1175/JCLI-D-20-0093.1
	Climate Extremes across the North American Arctic in Modern Reanalyses
	Avila-Diaz A.; Bromwich D.H.; Wilson A.B.; Justino F.; Wang S.-H.
发表日期	2021
ISSN	08948755
起始页码	2385
结束页码	2410
卷号	34 期号:7
英文摘要	Atmospheric reanalyses are a valuable climate-related resource where in situ data are sparse. However, few studies have investigated the skill of reanalyses to represent extreme climate indices over the North American Arctic, where changes have been rapid and indigenous responses to change are critical. This study investigates temperature and precipitation extremes as defined by the Expert Team on Climate Change Detection and Indices (ETCCDI) over a 17-yr period (2000-16) for regional and global reanalyses, namely the Arctic System Reanalysis, version 2 (ASRv2); North American Regional Reanalysis (NARR); European Centre for Medium-Range Weather Forecasts (ECMWF) ERA5 reanalysis; Modern-Era Retrospective Analysis for Research and Applications, version 2 (MERRA-2); and Global Meteorological Forcing Dataset for Land Surface Modeling (GMFD). Results indicate that the best performances are demonstrated by ASRv2 and ERA5. Relative to observations, reanalyses show the weakest performance over far northern basins (e.g., the Arctic and Hudson basins) where observing networks are less dense. Observations and reanalyses show consistent warming with decreased frequency and intensity of cold extremes. Cold days, cold nights, frost days, and ice days have decreased dramatically over the last two decades. Warming can be linked to a simultaneous increase in daily precipitation intensity over several basins in the domain. Moreover, the North Atlantic Oscillation (NAO) and Arctic Oscillation (AO) distinctly influence extreme climate indices. Thus, these findings detail the complexity of how the climate of the Arctic is changing, not just in an average sense, but in extreme events that have significant impacts on people and places. © 2021 American Meteorological Society.
英文关键词	Arctic; Extreme events; North America; Reanalysis data
语种	英语
scopus关键词	Atmospheric pressure; Weather forecasting; Arctic system reanalysis; Climate change detection; European centre for medium-range weather forecasts; Meteorological forcing; North Atlantic oscillations; Precipitation extremes; Research and application; Retrospective analysis; Climate change; air temperature; data set; extreme event; precipitation (climatology); regional climate; satellite imagery; weather forecasting; Arctic; North America
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/178588
作者单位	Department of Agricultural Engineering, Universidade Federal de Viçosa, Viçosa, Brazil; Polar Meteorology Group, Byrd Polar and Climate Research Center, The Ohio State University, Columbus, OH, United States
推荐引用方式 GB/T 7714	Avila-Diaz A.,Bromwich D.H.,Wilson A.B.,et al. Climate Extremes across the North American Arctic in Modern Reanalyses[J],2021,34(7).
APA	Avila-Diaz A.,Bromwich D.H.,Wilson A.B.,Justino F.,&Wang S.-H..(2021).Climate Extremes across the North American Arctic in Modern Reanalyses.Journal of Climate,34(7).
MLA	Avila-Diaz A.,et al."Climate Extremes across the North American Arctic in Modern Reanalyses".Journal of Climate 34.7(2021).