Regional Climate Modeling of Volcanic Eruptions and the Arctic Climate System

该奖项是根据2009年美国复苏和再投资法案（公法111-5）资助的。北极系统火山活动（VAST）项目正在调查热带和北极火山爆发对北极气候变化的影响。新的古气候记录正在开发中，全球气候模型正在用于模拟火山爆发的影响。这项研究将通过开发和使用区域气候模拟系统来增加VAST，以更好地了解北极气候系统的详细过程，并将全球气候变化与古记录点观测之间的尺度差距联系起来。研究人员将使用Polar WRF并对其进行调整，以研究冰岛巴芬岛和其他新的古记录表明大规模火山爆发后气候系统发生变化的地方。他们将研究该系统对火山强迫和海冰变化的敏感性，以确定巴芬岛冰盖形成的必要条件。他们还将研究瞬态气候演变成一个较冷的状态与全球气候模型模拟迫使模型。一旦为这些应用开发了区域建模系统，他们将使用它来研究冰岛火山爆发的区域反应，这些火山爆发比934- 939年的Eldgjá和1783-1784年的拉基火山爆发要小。

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).The Volcanism in the Arctic SysTem (VAST) project is investigating the effects of both tropical and Arctic volcanic eruptions on climate change in the Arctic. New paleoclimatic records are being developed and global climate models are being used to simulate the effects of volcanic eruptions. This research will add to VAST by developing and using a regional climate modeling system to understand better the detailed processes in the arctic climate system and to link the gap in scales between global climate change and point observations from paleo records. Researchers will use Polar WRF and tailor it to study Baffin Island, Iceland, and other locations where new paleo records indicate shifts in the climate system following large volcanic eruptions. They will study the sensitivity of the system to volcanic forcing and sea ice changes to determine, for example, what conditions are necessary for ice sheets to be initiated in Baffin Island. They will also study the transient climate evolution into a cooler state with the model forced by global climate model simulations. Once the regional modeling system is developed for these applications, they will use it to study the regional response to Icelandic eruptions that were smaller than the large 934- 939 Eldgjá and 1783-1784 Laki eruptions.