Warming impact of black carbon aerosols on the direct radiative forcing over a semi-arid location, Solapur in India

IF 3.9 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Atmospheric Pollution Research Pub Date : 2024-07-08 DOI:10.1016/j.apr.2024.102249

Pawan S. Soyam , Pramod D. Safai , Yang Lian , Abhilash S. Panicker , Sanjay S. Kale , Neelam Malap , Thara Prabhakaran

{"title":"Warming impact of black carbon aerosols on the direct radiative forcing over a semi-arid location, Solapur in India","authors":"Pawan S. Soyam , Pramod D. Safai , Yang Lian , Abhilash S. Panicker , Sanjay S. Kale , Neelam Malap , Thara Prabhakaran","doi":"10.1016/j.apr.2024.102249","DOIUrl":null,"url":null,"abstract":"<div><p>In this study, we investigated the aerosol radiative forcing (ARF) using ground-based measurements of PM<sub>2.5</sub> and black carbon aerosols at a semi-arid, rain shadow location, Solapur in peninsular India. It is observed that aerosols caused a net cooling effect at top of the atmosphere (TOP) indicating that the aerosols reflect more solar radiation back to space than they absorb. At the surface, the aerosols caused a net cooling effect indicating more presence of scattering type aerosols. The resulting ARF of the aerosols was found to be ranging from +38 Wm<sup>-2</sup> in monsoon to +53 Wm<sup>-2</sup> in pre-monsoon indicating trapping of energy which resulted in a warming of the atmosphere. However, BC –only forcing indicated a significant warming effect at TOP as well as in the atmosphere which showed the potential of the absorbing carbonaceous aerosols. Overall, BC was responsible for 44% and 32% of the composite ARF, even though it formed only 7% and 2% of composite aerosol in the dry and wet periods, respectively. The warming impact of BC aerosols was also manifested in terms of their contribution to aerosol radiative forcing efficiency (ARFE) which was about four times more for BC-only than that for composite aerosols. More atmospheric heating rates were observed during dry periods for composite and BC-only aerosols than during wet period. These findings have important implications for aerosol-cloud-precipitation studies as well as the atmospheric thermodynamics and hydrological cycle over this semi-arid region where the total aerosol load is not significant and rainfall amount is scarce.</p></div>","PeriodicalId":8604,"journal":{"name":"Atmospheric Pollution Research","volume":"15 10","pages":"Article 102249"},"PeriodicalIF":3.9000,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Atmospheric Pollution Research","FirstCategoryId":"93","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1309104224002149","RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}

引用次数: 0

Abstract

In this study, we investigated the aerosol radiative forcing (ARF) using ground-based measurements of PM_2.5 and black carbon aerosols at a semi-arid, rain shadow location, Solapur in peninsular India. It is observed that aerosols caused a net cooling effect at top of the atmosphere (TOP) indicating that the aerosols reflect more solar radiation back to space than they absorb. At the surface, the aerosols caused a net cooling effect indicating more presence of scattering type aerosols. The resulting ARF of the aerosols was found to be ranging from +38 Wm^-2 in monsoon to +53 Wm^-2 in pre-monsoon indicating trapping of energy which resulted in a warming of the atmosphere. However, BC –only forcing indicated a significant warming effect at TOP as well as in the atmosphere which showed the potential of the absorbing carbonaceous aerosols. Overall, BC was responsible for 44% and 32% of the composite ARF, even though it formed only 7% and 2% of composite aerosol in the dry and wet periods, respectively. The warming impact of BC aerosols was also manifested in terms of their contribution to aerosol radiative forcing efficiency (ARFE) which was about four times more for BC-only than that for composite aerosols. More atmospheric heating rates were observed during dry periods for composite and BC-only aerosols than during wet period. These findings have important implications for aerosol-cloud-precipitation studies as well as the atmospheric thermodynamics and hydrological cycle over this semi-arid region where the total aerosol load is not significant and rainfall amount is scarce.

查看原文本刊更多论文

黑碳气溶胶对印度索拉普尔半干旱地区直接辐射强迫的升温影响

在这项研究中，我们利用对印度半岛索拉普尔半干旱雨影地区 PM2.5 和黑碳气溶胶的地基测量，研究了气溶胶辐射强迫（ARF）。据观察，气溶胶在大气顶部（TOP）产生了净冷却效应，表明气溶胶反射回太空的太阳辐射多于其吸收的太阳辐射。在地表，气溶胶产生了净冷却效应，表明存在更多散射型气溶胶。研究发现，气溶胶产生的 ARF 从季风季节的 +38 Wm-2 到前季风季节的 +53 Wm-2 不等，这表明气溶胶捕获了能量，导致大气变暖。然而，仅 BC 的强迫表明在大气顶部和大气中都有显著的变暖效应，这显示了吸收碳质气溶胶的潜力。总体而言，尽管在干燥期和潮湿期，BC 气溶胶仅占复合气溶胶的 7% 和 2%，但它却分别造成了 44% 和 32% 的复合大气辐射强迫。单萃气溶胶对气溶胶辐射强迫效率（ARFE）的贡献大约是复合气溶胶的四倍。与潮湿时期相比，复合气溶胶和纯 BC 气溶胶在干燥时期的大气加热率更高。这些发现对气溶胶-云-降水研究以及这个气溶胶总负荷不大、降雨量稀少的半干旱地区的大气热力学和水文循环具有重要意义。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Atmospheric Pollution Research ENVIRONMENTAL SCIENCES-

CiteScore

8.30

自引率

6.70%

发文量

256

审稿时长

36 days

期刊介绍： Atmospheric Pollution Research (APR) is an international journal designed for the publication of articles on air pollution. Papers should present novel experimental results, theory and modeling of air pollution on local, regional, or global scales. Areas covered are research on inorganic, organic, and persistent organic air pollutants, air quality monitoring, air quality management, atmospheric dispersion and transport, air-surface (soil, water, and vegetation) exchange of pollutants, dry and wet deposition, indoor air quality, exposure assessment, health effects, satellite measurements, natural emissions, atmospheric chemistry, greenhouse gases, and effects on climate change.