Two Days Workshop to Study Wintertime Urban Atmospheric Pollution Processes; Fairbanks, Alaska; Mid-May 2018

该项目将于2018年5月初至中旬在阿拉斯加费尔班克斯举行为期两天的“冬季城市大气污染过程研究研讨会”。研讨会的目标是确定在寒冷和黑暗条件下发生的大气化学机制的基本知识差距，并制定评估冬季污染条件下的化学、微物理和动力学过程的策略。预计讲习班将改进区域模式，以便更好地预测城市空气质量，并为城市地区设计冬季空气污染缓解战略。目前，在持续低于冰点温度的地区进行的有限测量导致区域空气质量模型不能正确反映污染物的转化。研讨会要解决的科学问题包括：(1)在寒冷和黑暗的条件下，二次化学在增加细颗粒物污染中的作用是什么？(2)冬季主要的排放源有哪些？这些排放源对污染处理有何影响？本次研讨会将作为国际全球大气化学(IGAC)/国际北极科学共同体（IASC）“北极空气污染：气候、环境和社会”（PACES）项目的一部分举行。

This project supports the "Workshop to study wintertime urban atmospheric pollution processes" to be held in Fairbanks Alaska during 2 days in early to mid-May 2018. The goals of the workshop are to identify fundamental knowledge gaps in the understanding of atmospheric chemical mechanisms occurring under cold and dark conditions, and to develop strategies for evaluating chemical, microphysical, and dynamical processes under polluted wintertime conditions. The workshop is expected to result in improved regional modeling for better predictions of urban air quality and design of wintertime air pollution mitigation strategies for urban areas.Currently, limited measurements in regions with persistent sub-freezing temperatures result in regional air quality models that do not properly reflect pollutant transformations. Scientific questions to be addressed in the workshop include the following: (1) What is the role of secondary chemistry in increasing fine particulate pollution under cold and dark conditions? and (2) What are the key wintertime emission sources, and how do these emissions impact processing of pollution? This workshop will be held as part of the International Global Atmospheric Chemistry (IGAC)/International Arctic Science Community (IASC) "Air Pollution in the Arctic: Climate, Environment, and Societies" (PACES) project.