Collaborative Research: Type 1: LOI: L02170303: Arctic Climate Response to Decadal Changes in Radiative Forcing from Aerosols and Ozone

合作研究：类型 1：LOI：L02170303：北极气候对气溶胶和臭氧辐射强迫的十年变化的响应

• 批准号: 1049002
• 负责人: Cecilia Bitz
• 金额: $ 41.85万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-02-15 至 2015-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1049002&HistoricalAwards=false
• 关键词: Collaborative; Research; Type; LOI; L02170303

Current general circulation models (GCMs) have difficulty reproducing the rapid Arctic warming and sea ice loss observed over the past decades. One possible factor is that they do not properly represent the radiative forcings from aerosols and tropospheric ozone that could be particularly important in the Arctic. This EaSM Type 1 project will develop an improved understanding of the distributions and decadal trends of aerosols and ozone in the Arctic, including black carbon (BC) deposition fluxes and albedo effects for snow and sea ice, and will study the implications for Arctic climate change over the 1980-2010 period. It will build an interdisciplinary partnership between atmospheric chemists using the GEOS-Chem CTM and cryosphere scientists using CCSM4, to better describe aerosol-chemistry-climate interactions in the Community Earth System Model (CESM). The project will take advantage of intensive observations during the International Polar Year (IPY) to test and improve the GEOS-Chem representation of aerosols, ozone, and BC deposition fluxes in the Arctic. A 30-year GEOS-Chem simulation (1980-2010) with evolving sources from human activity and fires will be conducted and evaluated against long-term records. Aerosols, ozone, and BC deposition fluxes from GEOS-Chem will be input to CCSM4 to simulate Arctic radiative forcing and climate response over the 30-year period. Ensemble sensitivity simulations conducted with CCSM4 will diagnose the perturbations to temperature, sea ice, and atmospheric circulation associated with these radiative forcings. Knowledge gained from this project will be used to evaluate the simulation of Arctic aerosols, tropospheric ozone, and BC deposition fluxes within CESM. Fully coupled aerosol-chemistry-climate simulations of the 1980-2010 period will be conducted in CESM to assess Arctic climate response from aerosols and ozone and to investigate climate feedbacks. This project will also provide policy analysts with information on the role of aerosols and tropospheric ozone in driving Arctic climate change. Two graduate students will be trained in interdisciplinary environmental modeling.

当前的一般循环模型（GCM）难以再现过去几十年来观察到的快速北极变暖和海冰损失。一个可能的因素是，它们不能正确地表示来自气溶胶和对流层臭氧的辐射施加，这在北极尤其重要。这个EASM 1型项目将对北极中气溶胶和臭氧的分布和十年趋势提高理解，包括黑碳（BC）沉积通量以及对雪和海冰的反照效应，并将研究1980 - 2010年期间北极气候变化的影响。它将使用GEOS-CHEM CTM和使用CCSM4的Cryosphere科学家在大气化学家之间建立跨学科的伙伴关系，以更好地描述社区地球系统模型（CESM）中的气溶胶 - 化学 - 化学气候相互作用。该项目将利用国际极性年（IPY）的密集观察，以测试和改善北极气溶胶，臭氧和BC沉积通量的地理位置代表。将根据长期记录进行并评估30年的Geos-Chem模拟（1980-2010），并从人类活动和火灾中不断发展。 GEOS-CHEM的气溶胶，臭氧和BC沉积通量将输入到CCSM4，以模拟30年内的北极辐射强迫和气候反应。用CCSM4进行的集合灵敏度模拟将诊断与这些辐射强迫相关的温度，海冰和大气循环的扰动。从该项目中获得的知识将用于评估CESM内北极气溶胶，对流层臭氧和BC沉积通量的模拟。 1980 - 2010年期间将在CESM中进行完全耦合的气溶胶 - 化学气候模拟，以评估气溶胶和臭氧的北极气候反应，并研究气候反馈。 该项目还将为政策分析师提供有关气溶胶和对流层臭氧在推动北极气候变化中作用的信息。 两名研究生将接受跨学科环境建模的培训。