Collaborative Research: RAPID--Investigating Potential Secondary Organic Aerosol (SOA) Increases Due to Beetle Infestation Across the Western United States

这个快速项目是一个研究挥发性有机碳（VOC）排放量的变化，从小松树（松contorta变种。宽叶松小蠹（Dendroctonus ponderosae）在美国西部迅速蔓延的结果。黑松是西部山地森林中分布广泛、数量丰富的树种。从虫害和非虫害树木的挥发性有机化合物排放的初步测量显示不同的排放模式的单萜类化合物，这是二次有机气溶胶（SOA）形成的重要前体。由于不同的单萜在其SOA的形成潜力不同，在其排放模式的变化可能会有深远的影响，在区域尺度上的能见度和气候辐射强迫。这个项目有一些紧迫性，因为甲虫的侵扰正在进行中，并迅速蔓延。它提供了一个独特的，早期的机会，观察和记录的影响，对大气的昆虫侵扰的类型，预计将成为越来越频繁和严重的气候变暖。取样是在与美国农业部林务局协商并获得其批准后进行的，该部门已为在梅迪辛弓国家森林进行实地工作颁发了特别使用许可证。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。

This RAPID project is a study of the changes in volatile organic carbon (VOC) emissions from Lodgepole pine trees (Pinus contorta var. latifolia) as a result of the rapidly expanding infestation of pine bark beetles (Dendroctonus ponderosae) in the Western United States. Lodgepole pine is a widespread and abundant species in Western montane forests. Preliminary measurements of VOC emissions from infested and non-infested trees have shown different emission patterns of monoterpenes, which are important precursors for secondary organic aerosol (SOA) formation. Because the various monoterpenes differ in their SOA formation potential, changes in their patterns of emission may have far-reaching effects on visibility and radiative forcing of climate on a regional scale. There is some urgency to this project because the beetle infestation is underway and spreading rapidly. It offers a unique, early opportunity to observe and document impacts on the atmosphere of an insect infestation of the type that is projected to become increasingly frequent and severe as the climate warms. Sampling is carried out in consultation with and with the approval of the USDA Forest Service, which has issued a special use permit for field work in the Routt-Medicine Bow National Forest. This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).