Climate Sensitivity of Moderate- and Low-Resolution Versions of CCSM3 to Preindustrial ForcingsSource: Journal of Climate:;2006:;volume( 019 ):;issue: 011::page 2567Author:Otto-Bliesner, Bette L.
,
Tomas, Robert
,
Brady, Esther C.
,
Ammann, Caspar
,
Kothavala, Zav
,
Clauzet, Gabriel
DOI: 10.1175/JCLI3754.1Publisher: American Meteorological Society
Abstract: Preindustrial (PI) simulations of the Community Climate System Model version 3 (CCSM3) at two resolutions, a moderate and a low resolution, are described and compared to the standard controls for present-day (PD) simulations. Because of computational efficiency, the moderate- and low-resolution versions of CCSM3 may be appropriate for climate change studies requiring simulations of the order of hundreds to thousands of years. The PI simulations provide the basis for comparison for proxy records that represent average late Holocene conditions. When forced with PI trace gases, aerosols, and solar irradiance estimates, both resolutions have a global cooling of 1.2°?1.3°C, increased sea ice in both hemispheres, and less precipitation near the equator and at midlatitudes as compared to simulations using PD forcing. The response to PI forcings differs in the two resolutions for North Atlantic meridional overturning circulation (MOC), the Antarctic Circumpolar Current (ACC), and ENSO. The moderate-resolution CCSM3 has enhanced ACC, North Atlantic MOC, and tropical Pacific ENSO variability for PI forcings as compared to PD. The low-resolution CCSM3 with more extensive sea ice and colder climate at high northern latitudes in the PD simulation shows less sensitivity of the North Atlantic MOC to PI forcing. ENSO variability and the strength of the ACC do not increase with PI forcing in the low-resolution CCSM3.
|
Collections
Show full item record
contributor author | Otto-Bliesner, Bette L. | |
contributor author | Tomas, Robert | |
contributor author | Brady, Esther C. | |
contributor author | Ammann, Caspar | |
contributor author | Kothavala, Zav | |
contributor author | Clauzet, Gabriel | |
date accessioned | 2017-06-09T17:01:54Z | |
date available | 2017-06-09T17:01:54Z | |
date copyright | 2006/06/01 | |
date issued | 2006 | |
identifier issn | 0894-8755 | |
identifier other | ams-78222.pdf | |
identifier uri | http://onlinelibrary.yabesh.ir/handle/yetl/4220868 | |
description abstract | Preindustrial (PI) simulations of the Community Climate System Model version 3 (CCSM3) at two resolutions, a moderate and a low resolution, are described and compared to the standard controls for present-day (PD) simulations. Because of computational efficiency, the moderate- and low-resolution versions of CCSM3 may be appropriate for climate change studies requiring simulations of the order of hundreds to thousands of years. The PI simulations provide the basis for comparison for proxy records that represent average late Holocene conditions. When forced with PI trace gases, aerosols, and solar irradiance estimates, both resolutions have a global cooling of 1.2°?1.3°C, increased sea ice in both hemispheres, and less precipitation near the equator and at midlatitudes as compared to simulations using PD forcing. The response to PI forcings differs in the two resolutions for North Atlantic meridional overturning circulation (MOC), the Antarctic Circumpolar Current (ACC), and ENSO. The moderate-resolution CCSM3 has enhanced ACC, North Atlantic MOC, and tropical Pacific ENSO variability for PI forcings as compared to PD. The low-resolution CCSM3 with more extensive sea ice and colder climate at high northern latitudes in the PD simulation shows less sensitivity of the North Atlantic MOC to PI forcing. ENSO variability and the strength of the ACC do not increase with PI forcing in the low-resolution CCSM3. | |
publisher | American Meteorological Society | |
title | Climate Sensitivity of Moderate- and Low-Resolution Versions of CCSM3 to Preindustrial Forcings | |
type | Journal Paper | |
journal volume | 19 | |
journal issue | 11 | |
journal title | Journal of Climate | |
identifier doi | 10.1175/JCLI3754.1 | |
journal fristpage | 2567 | |
journal lastpage | 2583 | |
tree | Journal of Climate:;2006:;volume( 019 ):;issue: 011 | |
contenttype | Fulltext |