Srijana Lama
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View article: Global Identification of Solid Waste Methane Super Emitters Using Hyperspectral Satellites
Global Identification of Solid Waste Methane Super Emitters Using Hyperspectral Satellites Open
Solid waste is the third largest source of anthropogenic methane, and mitigating emissions is crucial for addressing climate change. We combine three high-resolution (30-60 m) hyperspectral satellite imagers (EMIT, EnMAP, and PRISMA) to qu…
View article: Evaluating national & urban Indian methane emissions using satellites 
Evaluating national & urban Indian methane emissions using satellites  Open
India ranks as the third-largest methane emitter globally, with methane emissions increasing by 30% since 1990. According to India’s most recent report to the United Nations Framework Convention on Climate Change (UNFCCC), anthropoge…
View article: Global identification of solid waste methane super emitters using hyperspectral satellites
Global identification of solid waste methane super emitters using hyperspectral satellites Open
Solid waste disposal facilities are the third largest anthropogenic source of methane, and mitigating their emissions is crucial for addressing global climate change. We combine three high-resolution (30–60 m) hyperspectral satellite image…
View article: A multi-tracer approach to study urban air pollution using satellites
A multi-tracer approach to study urban air pollution using satellites Open
Urban air quality is a growing environmental problem and threat to human health, especially in developing countries with limited resources to setup air quality monitoring networks in support of local pollution abatement policies. The burni…
View article: Estimation of OH in urban plumes using TROPOMI-inferred NO <sub>2</sub> ∕ CO
Estimation of OH in urban plumes using TROPOMI-inferred NO <sub>2</sub> ∕ CO Open
A new method is presented for estimating urban hydroxyl radical (OH) concentrations using the downwind decay of the ratio of nitrogen dioxide over carbon monoxide column-mixing ratios (XNO2/XCO) retrieved from the Tropospheric Monitoring I…
View article: Reply on RC1
Reply on RC1 Open
Abstract. A new method is presented to estimate urban hydroxyl radical (OH) concentrations using the downwind decay of the Tropospheric Monitoring Instrument (TROPOMI) derived nitrogen dioxide (NO2) / carbon monoxide (CO) ratio combined wi…
View article: Reply on RC2
Reply on RC2 Open
Abstract. A new method is presented to estimate urban hydroxyl radical (OH) concentrations using the downwind decay of the Tropospheric Monitoring Instrument (TROPOMI) derived nitrogen dioxide (NO2) / carbon monoxide (CO) ratio combined wi…
View article: Comment on egusphere-2022-278
Comment on egusphere-2022-278 Open
A new method is presented to estimate urban hydroxyl radical (OH) concentrations using the downwind decay of the Tropospheric Monitoring Instrument (TROPOMI) derived nitrogen dioxide (NO2) / carbon monoxide (CO) ratio combined with Weather…
View article: Estimation of OH in urban plume using TROPOMI inferred NO <sub>2</sub> / CO
Estimation of OH in urban plume using TROPOMI inferred NO <sub>2</sub> / CO Open
A new method is presented to estimate urban hydroxyl radical (OH) concentrations using the downwind decay of the Tropospheric Monitoring Instrument (TROPOMI) derived nitrogen dioxide (NO2) / carbon monoxide (CO) ratio combined with Weather…
View article: Assessing the Impact of Atmospheric CO2 and NO2 Measurements From Space on Estimating City-Scale Fossil Fuel CO2 Emissions in a Data Assimilation System
Assessing the Impact of Atmospheric CO2 and NO2 Measurements From Space on Estimating City-Scale Fossil Fuel CO2 Emissions in a Data Assimilation System Open
The European Copernicus programme plans to install a constellation of multiple polar orbiting satellites (Copernicus Anthropogenic CO 2 Monitoring Mission, CO2M mission) for observing atmospheric CO 2 content with the aim to estimate fossi…
View article: Estimation of OH in urban plume using TROPOMI inferred NO2/CO
Estimation of OH in urban plume using TROPOMI inferred NO2/CO Open
Earth and Space Science Open Archive This preprint has been submitted to and is under consideration at Atmospheric Chemistry and Physics . ESSOAr is a venue for early communication or feedback before peer review. Data may be preliminary.Le…
View article: Estimation of OH in urban plume using TROPOMI inferred NO2/CO
Estimation of OH in urban plume using TROPOMI inferred NO2/CO Open
A new method is presented to estimate urban OH concentrations using the downwind decay of the TROPOMI derived NO2/CO ratio combined with Weather Research Forecast (WRF) simulations. Seasonal OH concentrations, NOx and CO emissions for summ…
View article: Estimation of OH in urban plume using TROPOMI inferred NO2/CO
Estimation of OH in urban plume using TROPOMI inferred NO2/CO Open
We have created the file with the WRFOUTPUT of third domain. Due to the storage problem we have slice and create the WRFOUTPUT for every month. The information about the variables and the filename is provided in "README" documents.
View article: Assessing the constraint of the CO2 monitoring mission on fossil fuel emissions from power plants and a city in a regional carbon cycle fossil fuel data assimilation system
Assessing the constraint of the CO2 monitoring mission on fossil fuel emissions from power plants and a city in a regional carbon cycle fossil fuel data assimilation system Open
<p>The Paris Agreement foresees to establish a transparency framework that builds upon inventory-based national greenhouse gas emission reports, complemented by independent emission estimates derived from atmospheric measurements thr…
View article: Quantifying burning efficiency in megacities using the NO <sub>2</sub> ∕CO ratio from the Tropospheric Monitoring Instrument (TROPOMI)
Quantifying burning efficiency in megacities using the NO <sub>2</sub> ∕CO ratio from the Tropospheric Monitoring Instrument (TROPOMI) Open
This study investigates the use of co-located nitrogen dioxide (NO2) and carbon monoxide (CO) retrievals from the TROPOMI satellite to improve the quantification of burning efficiency and emission factors (EFs) over the megacities of Tehra…
View article: #Reveiwer 2: Quantifying burning ef&amp;#64257;ciency in Megacities using NO2 /CO ratio from the Tropospheric Monitoring Instrument (TROPOMI)&amp;#8221;
#Reveiwer 2: Quantifying burning ef&#64257;ciency in Megacities using NO2 /CO ratio from the Tropospheric Monitoring Instrument (TROPOMI)&#8221; Open
The paper presents NOx/CO emission ratios as derived from satellite observations of NO2 and CO.It demonstrates the high potential of TROPOMI for atmospheric research.The paper is generally well written.However, the details of the method la…
View article: # Reviewer 1: Quantifying burning efficiency in Megacities using NO2 /CO ratio from the Tropospheric Monitoring Instrument (TROPOMI)&amp;#8221;
# Reviewer 1: Quantifying burning efficiency in Megacities using NO2 /CO ratio from the Tropospheric Monitoring Instrument (TROPOMI)&#8221; Open
This manuscript presents a novel application of satellite measurements of CO and NO2 to estimate regional-average burning efficiency for a number of large cities.The method is enabled by the capabilities of a relatively new satellite senso…
View article: #Reveiwer 3: Quantifying burning ef&amp;#64257;ciency in Megacities using NO2 /CO ratio from the Tropospheric Monitoring Instrument (TROPOMI)&amp;#8221;
#Reveiwer 3: Quantifying burning ef&#64257;ciency in Megacities using NO2 /CO ratio from the Tropospheric Monitoring Instrument (TROPOMI)&#8221; Open
This study presents new results from TROPOMI for NO2/CO emission factors that provide information about combustion efficiency on urban scales.This is an important result for understanding how well these emissions are represented in standar…
View article: # Reviewer 1: Quantifying burning efficiency in Megacities using NO2 /CO ratio from the Tropospheric Monitoring Instrument (TROPOMI)&amp;#8221;
# Reviewer 1: Quantifying burning efficiency in Megacities using NO2 /CO ratio from the Tropospheric Monitoring Instrument (TROPOMI)&#8221; Open
This manuscript presents a novel application of satellite measurements of CO and NO2 to estimate regional-average burning ef?ciency for a number of large cities.The method is enabled by the capabilities of a relatively new satellite sensor…
View article: Quantifying burning efficiency in Megacities using NO2/CO ratio from the Tropospheric Monitoring Instrument (TROPOMI)
Quantifying burning efficiency in Megacities using NO2/CO ratio from the Tropospheric Monitoring Instrument (TROPOMI) Open
<p>Economic development and rapid urbanization have increased the consumption of fossil fuel in megacities degrading the local air quality. Burning efficiency is a major factor determining the impact of fuel burning on the environmen…
View article: Quantifying burning efficiency in Megacities using NO <sub>2</sub> / CO ratio from the Tropospheric Monitoring Instrument (TROPOMI)
Quantifying burning efficiency in Megacities using NO <sub>2</sub> / CO ratio from the Tropospheric Monitoring Instrument (TROPOMI) Open
This study investigates the use of co-located NO2 and CO retrievals from the TROPOMI satellite to improve the quantification of burning efficiency and emission factors over the mega-cities of Tehran, Mexico City, Cairo, Riyadh, Lahore and …