BORTAS: In-situ Atmospheric Airborne and model data

The Quantifying the impact of BOReal forest fires on Tropospheric oxidants over the Atlantic using Aircraft and Satellites (BORTAS) project provides information on the connection between the composition and the distribution of biomass burning outflow, ozone production and loss within the outflow, and the resulting perturbation to oxidant chemistry in the troposphere. The BORTAS team sampled biomass burning outflow over the North Atlantic in summer 2011 the using Facility for Airborne Atmospheric Measurements (FAAM) BAe-146 aircraft. The data were then used to describe the observed chemistry within plumes and to quantify the impact of boreal fires on the North Atlantic region using a nested 3-D chemistry transport model.

This dataset contains atmospheric aircraft and model data.

Science Objectives of BORTAS:

-Sample biomass burning outflow from boreal North America over the western boundary of the North Atlantic during summer 2011 using the FAAM BAe146 aircraft;
-Describe observed chemistry within plumes by using the measurements to constrain the Master Chemical Mechanism (MCM), with particular attention to the NOy and organic chemistry;
-Derive a reduced chemical mechanism suitable for a global Chemical Transport Model (CTM) that accurately describes chemistry within the plumes;
-Quantify the impact of boreal forest fires on oxidant chemistry over the temperate and subtropical Atlantic using a nested 3-D chemistry transport model, driven by a subset of MCM chemistry and by assimilated field measurements; and
-Detect, validate and quantify the impact of boreal biomass burning on global tropospheric composition using data from space-borne sensors.

The FAAM airborne sampling element of the BORTAS project took place in July and August 2011.

BORTAS（量化北大西洋上空平流层氧化剂的BOReal森林火灾影响）项目，通过飞机和卫星数据，揭示了生物质燃烧排放物成分与分布、臭氧的生成与损耗及其在排放层中的变化，对平流层氧化剂化学组成的扰动之间的关联。该团队于2011年夏季利用FAAM BAe-146飞机对北大西洋北部的生物质燃烧排放物进行了采样，并使用空中大气测量设施（FAAM）的数据描述了烟羽中的观测化学成分，并通过嵌套的三维化学传输模型量化了北极森林火灾对北大西洋地区的影响。本数据集包含大气飞机和模型数据。
BORTAS项目科学目标如下：
- 利用FAAM BAe146飞机，于2011年夏季在北大西洋西部边界采集北美洲北部生物质燃烧排放物样本；
- 通过测量数据限制主化学机制（MCM），特别注意NOy和有机化学，描述烟羽内的观测化学成分；
- 推导出适用于全球化学传输模型（CTM）的简化化学机制，该机制能够准确描述烟羽中的化学成分；
- 使用MCM化学子集和同化现场测量数据，通过嵌套的三维化学传输模型量化北极森林火灾对温带和亚热带大西洋氧化剂化学的影响；
- 利用来自太空传感器的数据，检测、验证并量化北极生物质燃烧对全球对流层组成的冲击。
FAAM空中采样元素于2011年7月至8月进行。