Premonsoon aerosol characterization and radiative effects over the Indo‐Gangetic Plains: Implications for regional climate warming
Reads0
Chats0
TLDR
In this paper, a detailed characterization of aerosols over the Indo-Gangetic Plains (IGP) and their radiative effects during the pre-monsoon season (April-May-June) was presented, using ground radiometric and spaceborne observations.Abstract:
The Himalayas have a profound effect on the South Asian climate and the regional hydrological cycle, as it forms a barrier for the strong monsoon winds and serves as an elevated heat source, thus controlling the onset and distribution of precipitation during the Indian summer monsoon. Recent studies have suggested that radiative heating by absorbing aerosols, such as dust and black carbon over the Indo-Gangetic Plains (IGP) and slopes of the Himalayas, may significantly accelerate the seasonal warming of the Hindu Kush-Himalayas-Tibetan Plateau (HKHT) and influence the subsequent evolution of the summer monsoon. This paper presents a detailed characterization of aerosols over the IGP and their radiative effects during the premonsoon season (April-May-June) when dust transport constitutes the bulk of the regional aerosol loading, using ground radiometric and spaceborne observations. During the dust-laden period, there is a strong response of surface shortwave flux to aerosol absorption indicated by the diurnally averaged forcing efficiency of -70 W/sq m per unit optical depth. The simulated aerosol single-scattering albedo, constrained by surface flux and aerosol measurements, is estimated to be 0.89+/- 0.01 (at approx.550 nm) with diurnal mean surface and top-of-atmosphere forcing values ranging from -11 to -79.8 W/sq m and +1.4 to +12 W/sq m, respectively, for the premonsoon period. The model-simulated solar heating rate profile peaks in the lower troposphere with enhanced heating penetrating into the middle troposphere (5-6 km), caused by vertically extended aerosols over the IGP with peak altitude of approx.5 km as indicated by spaceborne Cloud-Aerosol Lidar with Orthogonal Polarization observations. On a long-term climate scale, our analysis, on the basis of microwave satellite measurements of tropospheric temperatures from 1979 to 2007, indicates accelerated annual mean warming rates found over the Himalayan-Hindu Kush region (0.21 C/decade+/-0.08 C/decade) and underscores the potential role of enhanced aerosol solar absorption in the maximum warming localized over the western Himalayas (0.26 C/decade f 0.09 C/decade) that significantly exceed the entire HKHT and global warming rates. We believe the accelerated warming rates reported here are critical to both the South Asian summer monsoon and hydro-glaciological resource variability in the Himalayan-Hindu Kush snowpack and therefore to the densely populated downstream regions.read more
Citations
More filters
Journal ArticleDOI
Validation of MODIS retrieval aerosol optical depth and an investigation of aerosol transport over Mohal in north western Indian Himalaya
Raj Paul Guleria,Jagdish Chandra Kuniyal,Pan Singh Rawat,Harinder Kumar Thakur,Manum Sharma,Nand Lal Sharma,P. P. Dhyani,Mahavir Singh +7 more
TL;DR: In this article, the optical properties of aerosols during 2007 over Mohal 31.9o N, 77.12o E in north western Indian Himalaya, investigated using ground-based measurements and multi-satellite data.
Journal ArticleDOI
Monitoring and mapping of snow cover variability using topographically derived NDSI model over north Indian Himalayas during the period 2008–19
TL;DR: In this article, the analysis of snow cover variability over North Indian Himalayas (NIH) covering Western Himalayan and Karakoram mountain ranges has been described and the snow cover area (SCA) has been analyzed in three different climate zones such as upper Himalayan zone (UHZ), middle Himalayan zones (MHZ) (Great Himalaya and Zanskar) at various elevation levels as well as aspect levels during the past decade (2008-2019).
Journal ArticleDOI
Air Pollution, Climate Change, and Human Health in Indian Cities: A Brief Review
Rajveer Kaur,Puneeta Pandey +1 more
TL;DR: In this paper, the authors explored the status of air pollution in selected Indian cities and its effect on human health in these cities and examined the role of air pollutants and particulate matter (aerosols) in climate change for urban areas.
Journal ArticleDOI
Spatial and temporal variations of blowing dust events in the Taklimakan Desert
TL;DR: In this article, the spatial and temporal variations of blowing dust events, including sandstorms and blowing sand, and its relations with climatic parameters in the Taklimakan Desert were analyzed using data from ten desert-edge meteorological stations during 1961 to 2010 and two inner-desert meteorological station during 1988 to 1990, 1996 to 2010, and 1992 to 2010.
Journal ArticleDOI
Vertical distribution of smoke aerosols over upper Indo-Gangetic Plain.
K. S. Vinjamuri,Alaa Mhawish,Tirthankar Banerjee,Meytar Sorek-Hamer,David M. Broday,R. K. Mall,Mohd Talib Latif +6 more
TL;DR: There was evidence that despite travelling efficiently to FT, major proportion of smoke AOD continue to remain close to the surface (<3 km) thereby, may have greater implications on regional climate, air quality, smoke transport and AOD-particulate modelling.
References
More filters
Climate change 2007: the physical science basis
Susan Solomon,Dahe Qin,Martin R. Manning,Melinda Marquis,Kristen Averyt,Melinda M.B. Tignor,H. L. Miller,Z. Chen +7 more
TL;DR: The first volume of the IPCC's Fourth Assessment Report as mentioned in this paper was published in 2007 and covers several topics including the extensive range of observations now available for the atmosphere and surface, changes in sea level, assesses the paleoclimatic perspective, climate change causes both natural and anthropogenic, and climate models for projections of global climate.
Journal ArticleDOI
Climate Change 2007: The Physical Science Basis Summary for Policymakers:
Journal ArticleDOI
AERONET-a federated instrument network and data archive for aerosol Characterization
Brent N. Holben,Thomas F. Eck,Ilya Slutsker,Didier Tanré,J. P. Buis,Alberto Setzer,Eric Vermote,John A. Reagan,Yoram J. Kaufman,Teruyuki Nakajima,François Lavenu,I. Jankowiak,Alexander Smirnov +12 more
TL;DR: The operation and philosophy of the monitoring system, the precision and accuracy of the measuring radiometers, a brief description of the processing system, and access to the database are discussed.
MonographDOI
Mitigation from a cross-sectoral perspective
Terry Barker,I. Bashmakov,Awwad Alharthi,Markus Ammann,Luis Cifuentes,John Drexhage,Duan Maosheng,Ottmar Edenhofer,Brian Flannery,Michael Grubb,Monique Hoogwijk,Francis Ibitoye,Catrinus J. Jepma,William A. Pizer,Kenji Yamaji,Shimon Awerbuch,Lenny Bernstein,André Faaij,Hitoshi Hayami,Tom Heggedal,Snorre Kverndokk,John Latham,Axel Michaelowa,David Popp,Peter L. Read,Stefan Schleicher,Michael D. Smith,Ferenc Toth,Bert Metz,Ogunlade Davidson,Peter Bosch,Rutu Dave,Leo Meyer +32 more