气候变化领域集成服务门户(CCPortal): Dynamical Downscaling of Future Hydrographic Changes over the Northwest Atlantic Ocean

CCPortal

DOI	10.1175/JCLI-D-19-0483.1
	Dynamical Downscaling of Future Hydrographic Changes over the Northwest Atlantic Ocean
	Shin S.-I.; Alexander M.A.
发表日期	2020
ISSN	0894-8755
起始页码	2871
结束页码	2890
卷号	33 期号:7
英文摘要	Projected climate changes along the U.S. East and Gulf Coasts were examined using the eddy-resolving Regional Ocean Modeling System (ROMS). First, a control (CTRL) ROMS simulation was performed using boundary conditions derived from observations. Then climate change signals, obtained as mean seasonal cycle differences between the recent past (1976–2005) and future (2070–99) periods in a coupled global climate model under the RCP8.5 greenhouse gas trajectory, were added to the initial and boundary conditions of the CTRL in a second (RCP85) ROMS simulation. The differences between the RCP85 and CTRL simulations were used to investigate the regional effects of climate change. Relative to the coarse-resolution coupled climate model, the downscaled projection shows that SST changes become more pronounced near the U.S. East Coast, and the Gulf Stream is further reduced in speed and shifted southward. Moreover, the downscaled projection shows enhanced warming of ocean bottom temperatures along the U.S. East and Gulf Coasts, particularly in the Gulf of Maine and the Gulf of Saint Lawrence. The enhanced warming was related to an improved representation of the ocean circulation, including topographically trapped coastal ocean currents and slope water intrusion through the Northeast Channel into the Gulf of Maine. In response to increased radiative forcing, much warmer than present-day Labrador Subarctic Slope Waters entered the Gulf of Maine through the Northeast Channel, warming the deeper portions of the gulf by more than 48C. © 2020 American Meteorological Society.
英文关键词	Atmospheric radiation; Boundary conditions; Climate models; Greenhouse gases; Ocean currents; Bottom temperature; Coupled climate model; Coupled global climate model; Dynamical downscaling; Hydrographic changes; Initial and boundary conditions; Radiative forcings; Regional ocean modeling system; Climate change; boundary condition; climate change; climate modeling; downscaling; eddy; hydrological response; regional climate; sea surface temperature; warming; Atlantic Coast [North America]; Atlantic Coast [United States]; Atlantic Ocean; Atlantic Ocean (Northwest); Gulf of Maine; Gulf Stream; United States
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/171551
作者单位	CIRES, University of Colorado Boulder, Physical Science Division, NOAA/Earth System Research Laboratory, Boulder, CO, United States; Physical Science Division, NOAA/Earth System Research Laboratory, Boulder, CO, United States
推荐引用方式 GB/T 7714	Shin S.-I.,Alexander M.A.. Dynamical Downscaling of Future Hydrographic Changes over the Northwest Atlantic Ocean[J],2020,33(7).
APA	Shin S.-I.,&Alexander M.A..(2020).Dynamical Downscaling of Future Hydrographic Changes over the Northwest Atlantic Ocean.Journal of Climate,33(7).
MLA	Shin S.-I.,et al."Dynamical Downscaling of Future Hydrographic Changes over the Northwest Atlantic Ocean".Journal of Climate 33.7(2020).