首页> 外文期刊>Journal of geophysical research >Deposition of Organic and Black Carbon: Direct Measurements at Three Remote Stations in the Himalayas and Tibetan Plateau
【24h】

Deposition of Organic and Black Carbon: Direct Measurements at Three Remote Stations in the Himalayas and Tibetan Plateau

机译:有机碳和黑碳的沉积:在喜马拉雅山和青藏高原的三个偏远站点进行直接测量

获取原文
获取原文并翻译 | 示例
获取外文期刊封面目录资料

摘要

Carbonaceous matter in the atmosphere has an important influence on climate change. Currently, the deposition of carbonaceous matter is one of the largest uncertainties in the climate system. This phenomenon is common in remote regions, such as the Himalayas and Tibetan Plateau. In this study, for the first time, we reported in situ measurements of wet and dry deposition rates of carbonaceous matter at three remote stations: Nam Co, Lulang, and Everest. The results showed that the annual wet deposition rates of water-insoluble organic carbon (WIOC) and black carbon (BC) were 60.2 and 5.8 mg.m(-2).year(-1), 330 and 34.6 mg.m(-2).year(-1), and 47.0 and 2.6 mg.m(-2).year(-1) at the Nam Co, Lulang, and Everest stations, respectively. Seasonal variations in the wet deposition rates of WIOC and BC were controlled by precipitation amount and their atmospheric concentrations. In addition, the wet scavenging ratios of WIOC and BC at Nam Co Station were close to those observed in other remote areas. The total BC deposition at Nam Co Station (15.3 mg.m(-2).year(-1)) was higher than that from chemical transport models, implying a dominant role of dry deposition of BC in the total deposition at this station and an urgent need to improve the aerosol deposition in models for the Himalayas and Tibetan Plateau. It was found that the deposition rates of carbonaceous matter in the Himalayas and Tibetan Plateau had large spatial variation; thus, high-resolution models need to be applied in the future.
机译:大气中的碳质物质对气候变化有重要影响。目前,碳质物质的沉积是气候系统中最大的不确定性之一。这种现象在喜马拉雅山和青藏高原等偏远地区很常见。在这项研究中,我们首次报告了三个偏远站点(Nam Co、Lulang 和 Everest)的碳质湿沉降和干沉降速率的原位测量。结果表明:南科站、鲁朗站和珠穆朗玛峰站的水不溶性有机碳(WIOC)和黑碳(BC)年湿沉降速率分别为60.2和5.8 mg.m(-2).year(-1)、330和34.6 mg.m(-2).year(-1)、47.0和2.6 mg.m(-2).year(-1)。WIOC和BC湿沉降速率的季节变化受降水量及其大气浓度的控制。此外,南科站WIOC和BC的湿清除率与其他偏远地区接近。南科站BC总沉降量(15.3 mg.m(-2).year(-1))高于化学输运模型,表明BC干沉积在该站总沉积量中占主导地位,亟需改善喜马拉雅山和青藏高原模型中的气溶胶沉降。结果表明,喜马拉雅山和青藏高原碳质沉积速率存在较大的空间变化;因此,未来需要应用高分辨率模型。

著录项

获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号