M. Rajeevan
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Shifted Diurnal Cycle of Indian Summer Monsoon Rainfall Open
One of the most prominent weather and climate variations occurs at diurnal time scale, synchronously or asynchronously with the top of the atmosphere insolation. The corresponding variations in energy budget, specifically concerning moist …
View article: Influence of Ground‐Based Microwave Radiometer Profile Assimilation on Fog Genesis Forecasts in the Winter Boundary Layer of Northern India
Influence of Ground‐Based Microwave Radiometer Profile Assimilation on Fog Genesis Forecasts in the Winter Boundary Layer of Northern India Open
This study investigates the synergistic impacts of conventional and non‐conventional atmospheric data assimilation (DA) and fine‐gridded soil state assimilation on wintertime fog formation over the Indo‐Gangetic Plain (IGP), with a specifi…
View article: Regional Shift in the Peak Time of Maximum Indian Summer Monsoon Rainfall in Recent Decades
Regional Shift in the Peak Time of Maximum Indian Summer Monsoon Rainfall in Recent Decades Open
Global warming is causing more extreme precipitation events and variability in rainfall patterns, which are affecting the timing of peak rainfall occurrence and impacting the hydrological cycle in evolving climates. This study examines spa…
Evolution of Monitoring and Forecasting of Southwest Monsoon Open
In this review article, we discuss how monsoon monitoring and forecasting has evolved over the last 150 years. Since there are several other articles in this issue on short-range and operational forecasts of the IMD, we focus only on the d…
Sub-daily scale rainfall extremes in India and incongruity between hourly rain gauges data and CMIP6 models Open
Self-recording rain gauges hourly rainfall data from 1969 to 2010 have been utilized to identify rain events at a sub-daily scale. At the sub-daily scale, a significant decrease in the frequency of heavy rainfall events (HREs) is observed …
View article: Reactive chlorine-, sulfur-, and nitrogen-containing volatile organic compounds impact atmospheric chemistry in the megacity of Delhi during both clean and extremely polluted seasons
Reactive chlorine-, sulfur-, and nitrogen-containing volatile organic compounds impact atmospheric chemistry in the megacity of Delhi during both clean and extremely polluted seasons Open
Volatile organic compounds (VOCs) significantly impact the atmospheric chemistry of polluted megacities. Delhi is a dynamically changing megacity, and yet our knowledge of its ambient VOC composition and chemistry is limited to few studies…
View article: Air Quality Warning and Integrated Decision Support System for Emissions (AIRWISE): Enhancing Air Quality Management in Megacities
Air Quality Warning and Integrated Decision Support System for Emissions (AIRWISE): Enhancing Air Quality Management in Megacities Open
Air pollution poses a significant environmental risk to large cities worldwide, including New Delhi, India’s capital. The occurrence of frequent episodes of elevated levels of air pollution during October–March in Delhi and National Capita…
View article: Biomass-burning sources control ambient particulate matter, but traffic and industrial sources control volatile organic compound (VOC) emissions and secondary-pollutant formation during extreme pollution events in Delhi
Biomass-burning sources control ambient particulate matter, but traffic and industrial sources control volatile organic compound (VOC) emissions and secondary-pollutant formation during extreme pollution events in Delhi Open
Volatile organic compounds (VOCs) and particulate matter (PM) are major constituents of smog. Delhi experiences severe smog during the post-monsoon season, but a quantitative understanding of VOCs and PM sources is still lacking. Here, we …
Indian summer monsoon rainfall response to two distinct evolutions of La Niña events Open
This study examines the asymmetry in the Indian summer monsoon rainfall (ISMR) response over India and its four homogeneous regions to two distinct types of temporal evolution in La Niña. We have shown this uneven response by analysing the…
View article: Is a more physical representation of aerosol chemistry needed for fog forecasting?
Is a more physical representation of aerosol chemistry needed for fog forecasting? Open
With the changing climate, the study of fog formation is essential due to the impact of the complexity of natural and anthropogenic aerosols. The evolution of the droplet size distribution in the presence of different aerosol species remai…
View article: Comment on egusphere-2024-500
Comment on egusphere-2024-500 Open
Abstract. Volatile organic compounds significantly impact the atmospheric chemistry of polluted megacities. Delhi is a dynamically changing megacity and yet our knowledge of its ambient VOC composition and chemistry is limited to few studi…
View article: Comment on egusphere-2024-500
Comment on egusphere-2024-500 Open
Abstract. Volatile organic compounds significantly impact the atmospheric chemistry of polluted megacities. Delhi is a dynamically changing megacity and yet our knowledge of its ambient VOC composition and chemistry is limited to few studi…
View article: Decision Support System version 1.0 (DSS v1.0) for air quality management in Delhi, India
Decision Support System version 1.0 (DSS v1.0) for air quality management in Delhi, India Open
This paper discusses the newly developed Decision Support System version 1.0 (DSS v1.0) for air quality management activities in Delhi, India. In addition to standard air quality forecasts, DSS provides the contribution of Delhi, its surro…
View article: Discovery of reactive chlorine, sulphur and nitrogen containing ambient volatile organic compounds in the megacity of Delhi during both clean and extremely polluted seasons
Discovery of reactive chlorine, sulphur and nitrogen containing ambient volatile organic compounds in the megacity of Delhi during both clean and extremely polluted seasons Open
Volatile organic compounds significantly impact the atmospheric chemistry of polluted megacities. Delhi is a dynamically changing megacity and yet our knowledge of its ambient VOC composition and chemistry is limited to few studies conduct…
View article: Supplementary material to "Discovery of reactive chlorine, sulphur and nitrogen containing ambient volatile organic compounds in the megacity of Delhi during both clean and extremely polluted seasons"
Supplementary material to "Discovery of reactive chlorine, sulphur and nitrogen containing ambient volatile organic compounds in the megacity of Delhi during both clean and extremely polluted seasons" Open
Table S1: Operational settings for PTR-TOF-MS 10 K parameters used during this deployment Parameters Values Overall drift voltage (Udrift) Temperature at drift tube (Tdrift) Pressure at drift tube (Pdrift) Length of the drift tube (Ldrift)…
View article: Supplementary material to "Biomass burning sources control ambient particulate matter but traffic and industrial sources control VOCs and secondary pollutant formation during extreme pollution events in Delhi"
Supplementary material to "Biomass burning sources control ambient particulate matter but traffic and industrial sources control VOCs and secondary pollutant formation during extreme pollution events in Delhi" Open
Table S1: 111 NMVOCs species used in the PMF model, the table lists the major compound identifications and the references supporting such assignments from previous works along with detection limits.
View article: Biomass burning sources control ambient particulate matter but traffic and industrial sources control VOCs and secondary pollutant formation during extreme pollution events in Delhi
Biomass burning sources control ambient particulate matter but traffic and industrial sources control VOCs and secondary pollutant formation during extreme pollution events in Delhi Open
Volatile organic compounds (VOCs) and particulate matter (PM) are major constituents of smog. Delhi experiences severe smog during post-monsoon season, but a quantitative understanding of VOCs and PM sources is still lacking. Here, we sour…
View article: Implementation of WRF-Urban Asymmetric Convective Model (UACM) for Simulating Urban Fog over Delhi, India
Implementation of WRF-Urban Asymmetric Convective Model (UACM) for Simulating Urban Fog over Delhi, India Open
Accurate fog prediction in densely urbanized cities poses a challenge due to the complex influence of urban morphology on meteorological conditions in the urban roughness sublayer. This study implemented a coupled WRF-Urban Asymmetric Conv…
View article: Regional Climates
Regional Climates Open
© 2023 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses). Corresponding authors: North America: Ahira Sá…
View article: Decision Support System version 1.0 (DSS v1.0) for air quality management in Delhi, India
Decision Support System version 1.0 (DSS v1.0) for air quality management in Delhi, India Open
This paper discusses the newly developed Decision Support System version 1.0 (DSS v1.0) for air quality management activities in Delhi, India. In addition to standard air quality forecasts, DSS provides the contribution of Delhi, its surro…
Asymmetry in the Indian Summer Monsoon Rainfall response to two types of La Niña evolution Open
This study attempts to understand the asymmetry in the Indian Summer Monsoon Rainfall (ISMR) response to two types of La Niña whether they evolved from El Niño or La Niña in the previous boreal winter season. It was seen that nine La Niña …
An Analysis of Prediction Skill of Heat Waves Over India Using TIGGE Ensemble Forecasts Open
Heat wave has become a great concern for India in the recent years due to its disastrous impact on various sectors including health. Thus, accurate forecasts of heat wave events well in advance are required for preparing adequate mitigatio…
View article: Thermodynamical framework for effective mitigation of high aerosol loading in the Indo-Gangetic Plain during winter
Thermodynamical framework for effective mitigation of high aerosol loading in the Indo-Gangetic Plain during winter Open
The Indo-Gangetic Plain (IGP) experiences severe air pollution every winter, with ammonium chloride and ammonium nitrate as the major inorganic fractions of fine aerosols. Many past attempts to tackle air pollution in the IGP were inadequa…
Simulation of Latent Heating Rate From the Microphysical Process Associated With Mesoscale Convective System Over Korean Peninsula Open
To investigate the structure of latent heating rate during different stages of mesoscale convective system (MCS) over the Korean Peninsula, a four nested domain Weather Research and Forecasting (WRF) model simulation with two‐way nesting m…
View article: Regional Climates
Regional Climates Open
Regional Climates is one chapter from the State of the Climate in 2021 annual report. Compiled \nby NOAA’s National Centers for Environmental Information, State of the Climate in 2021 is \nbased on contributions from scientists from around…