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Article
Atmospheric Wind Estimation Using Adaptive Block James–Stein Technique for Higher Range Coverage in MST Radar
Measuring atmospheric winds over longer ranges using VHF-MST radar is extremely useful for studying stratosphere-troposphere exchange. The present study uses an adaptive block technique (ABlockJS), a mixed mod...
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Article
Formation and maintenance of monsoon inversion over the Arabian Sea
Monsoon Inversion (MI) plays a key role and is one of the semi-permanent features of Asian Summer Monsoon. MI is defined as a sustained temperature inversion (TI) that is observed in the lower troposphere, dur...
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Article
Seasonal dependence of characteristics of rain drop size distribution over two different climatic zones of India
Raindrop size distribution (DSD) plays a significant role in understanding the microphysical process of rainfall and the quantitative precipitation estimation (QPE) in hydrology, especially in urban environmen...
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Article
Application of empirical Bayes adaptive estimation technique for estimating winds from MST radar covering higher altitudes
Most of the works on estimating winds from the Doppler information provided by the very high frequency (VHF) radars use either parametric or nonparametric techniques. The studies using nonparametric signal pro...
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Article
Open AccessCorrection to: Michelson Interferometer for Global High-Resolution Thermospheric Imaging (MIGHTI) On-Orbit Wind Observations: Data Analysis and Instrument Performance
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Article
Spatial variability of trace gases (NO2, O3 and CO) over Indian region during 2020 and 2021 COVID-19 lockdowns
COVID-19 lockdown has given us an opportunity to investigate the pollutant concentrations in response to the restricted anthropogenic activities. The atmospheric concentration levels of nitrogen dioxide (NO2), ca...
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Article
Open AccessMichelson Interferometer for Global High-Resolution Thermospheric Imaging (MIGHTI) On-Orbit Wind Observations: Data Analysis and Instrument Performance
The design, principles of operation, calibration, and data analysis approaches of the Michelson Interferometer for Global High-resolution Thermospheric Imaging (MIGHTI) on the NASA Ionospheric Connection (ICON...
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Article
Regional estimation of methane emissions over the peninsular India using atmospheric inverse modelling
Accurate renditions of country-scale methane (CH4) emissions are critical in understanding the regional CH4 budget and essential for adapting national climate mitigation policies to curtail the atmospheric build-...
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Article
Precipitation variability over India during the 20th and 21st centuries: investigating natural and anthropogenic drivers
Changes in precipitation pattern can lead to widespread impacts across natural and human systems. This study assesses precipitation variability as well as anthropogenic and natural factors responsible for the ...
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Article
Open AccessAnthropogenic influence on the changing risk of heat waves over India
The overarching goal of this paper is to shed light on the human influence on the changing patterns of heat waves in India using the Heat Wave Magnitude Index daily (HWMId). The HWMId obtained from the observa...
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Article
Open AccessChanging patterns in aerosol vertical distribution over South and East Asia
Changing patterns in aerosol concentrations over the Asian region is well documented with a concurrent increase over India and a marked reduction over China. However, aerosol vertical distribution in the chang...
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Article
Upper tropospheric ozone transport from the sub-tropics to tropics over the Indian region during Asian summer monsoon
In this study, we investigate the role of the Asian summer monsoon (ASM) anticyclone in the distribution of ozone over the southern India and tropical Indian Ocean. We present the horizontal and vertical struc...
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Article
Global climatology of planetary boundary layer top obtained from multi-satellite GPS RO observations
Accurate estimation of the planetary boundary layer (PBL) top is essential for air quality prediction, weather forecast, and assessment of regional and global climate models. In this article, the long-term cli...
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Article
Open AccessDo minor sudden stratospheric warmings in the Southern Hemisphere (SH) impact coupling between stratosphere and mesosphere–lower thermosphere (MLT) like major warmings?
We have investigated the coupling between the stratosphere and mesosphere–lower thermosphere (MLT) in the Southern Hemisphere (SH) during 2010 minor sudden stratospheric warmings (SSWs). Three episodic SSWs we...
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Article
Open AccessHistorical and Projected Surface Temperature over India during the 20th and 21st century
Surface Temperature (ST) over India has increased by ~0.055 K/decade during 1860–2005 and follows the global warming trend. Here, the natural and external forcings (e.g., natural and anthropogenic) responsible...
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Article
Evaluating CMIP5 models using GPS radio occultation COSMIC temperature in UTLS region during 2006–2013: twenty-first century projection and trends
This paper provides a first overview of the performance of global climate models participating in the Coupled Model Inter-Comparison Project phase 5 (CMIP5) in simulating the upper troposphere and lower strato...
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Article
Activity of radon (222Rn) in the lower atmospheric surface layer of a typical rural site in south India
Analysis of one year measurements of in situ radon (222Rn) and its progenies along with surface air temperature, relative humidity and pressure near to the Earth’s surface has been carried out for the first time ...
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Article
Upper tropospheric water vapour variability over tropical latitudes observed using radiosonde and satellite measurements
The present study deals with using long-term database for upper tropospheric water vapour (UTWV) variability studies over three tropical stations (Gadanki, Singapore and Truk), where different climatic conditi...
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Article
Global distribution of pauses observed with satellite measurements
Several studies have been carried out on the tropopause, stratopause, and mesopause (collectively termed as ‘pauses’) independently; however, all the pauses have not been studied together. We present global di...
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Article
Open AccessMorphology of tropical mesospheric echoes observed by VHF radar
This short communication reports on an attempt which has been made to study mesospheric echo occurrence duration for the first time, using a large data base (1998 to 2004) collected from MST radar located at G...
