Records
Author
Bhardwaj, A. ; Misra, V.
Title
The role of air-sea coupling in the downscaled hydroclimate projection over Peninsular Florida and the West Florida Shelf
Type
$loc['typeJournal Article']
Year
2019
Publication
Climate Dynamics
Abbreviated Journal
Clim Dyn
Volume
53
Issue
5-6
Pages
2931-2947
Keywords
Abstract
A comparative analysis of two sets of downscaled simulations of the current climate and the future climate projections over Peninsular Florida (PF) and the West Florida Shelf (WFS) is presented to isolate the role of high-resolution air-sea coupling. In addition, the downscaled integrations are also compared with the much coarser, driving global model projection to examine the impact of grid resolution of the models. The WFS region is habitat for significant marine resources, which has both commercial and recreational value. Additionally, the hydroclimatic features of the WFS and PF contrast each other. For example, the seasonal cycle of surface evaporation in these two regions are opposite in phase to one another. In this study, we downscale the Community Climate System Model version 4 (CCSM4) simulations of the late twentieth century and the mid-twenty-first century (with reference concentration pathway 8.5 emission scenario) using an atmosphere only Regional Spectral Model (RSM) at 10 km grid resolution. In another set, we downscale the same set of CCSM4 simulations using the coupled RSM-Regional Ocean Model System (RSMROMS) at 10 km grid resolution. The comparison of the twentieth century simulations suggest significant changes to the SST simulation over WFS from RSMROMS relative to CCSM4, with the former reducing the systematic errors of the seasonal mean SST over all seasons except in the boreal summer season. It may be noted that owing to the coarse resolution of CCSM4, the comparatively shallow bathymetry of the WFS and the sharp coastline along PF is poorly defined, which is significantly rectified at 10 km grid spacing in RSMROMS. The seasonal hydroclimate over PF and the WFS in the twentieth century simulation show significant bias in all three models with CCSM4 showing the least for a majority of the seasons, except in the wet June-July-August (JJA) season. In the JJA season, the errors of the surface hydroclimate over PF is the least in RSMROMS. The systematic errors of surface precipitation and evaporation are more comparable between the simulations of CCSM4 and RSMROMS, while they differ the most in moisture flux convergence. However, there is considerable improvement in RSMROMS compared to RSM simulations in terms of the seasonal bias of the hydroclimate over WFS and PF in all seasons of the year. This suggests the potential rectification impact of air-sea coupling on dynamic downscaling of CCSM4 twentieth century simulations. In terms of the climate projection in the decades of 2041-2060, the RSMROMS simulation indicate significant drying of the wet season over PF compared to moderate drying in CCSM4 and insignificant changes in the RSM projection. This contrasting projection is also associated with projected warming of SSTs along the WFS in RSMROMS as opposed to warming patterns of SST that is more zonal and across the WFS in CCSM4.
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Publisher
Place of Publication
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Summary Language
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Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
0930-7575
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ user @
Serial
1082
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Author
Bhardwaj, A. ; Misra, V.
Title
Monitoring the Indian Summer Monsoon Evolution at the Granularity of the Indian Meteorological Sub-divisions using Remotely Sensed Rainfall Products
Type
$loc['typeJournal Article']
Year
2019
Publication
Remote Sensing
Abbreviated Journal
Remote Sensing
Volume
11
Issue
9
Pages
1080
Keywords
Indian Summer Monsoon ; GPM ; TRMM satellite precipitation ; meteorological sub-divisions
Abstract
We make use of satellite-based rainfall products from the Tropical Rainfall Measuring Mission (TRMM) Multi-satellite Precipitation Analysis (TMPA) to objectively define local onset and demise of the Indian Summer Monsoon (ISM) at the spatial resolution of the meteorological subdivisions defined by the Indian Meteorological Department (IMD). These meteorological sub-divisions are the operational spatial scales for official forecasts issued by the IMD. Therefore, there is a direct practical utility to target these spatial scales for monitoring the evolution of the ISM. We find that the diagnosis of the climatological onset and demise dates and its variations from the TMPA product is quite similar to the rain gauge based analysis of the IMD, despite the differences in the duration of the two datasets. This study shows that the onset date variations of the ISM have a significant impact on the variations of the seasonal length and seasonal rainfall anomalies in many of the meteorological sub-divisions: for example, the early or later onset of the ISM is associated with longer and wetter or shorter and drier ISM seasons, respectively. It is shown that TMPA dataset (and therefore its follow up Global Precipitation Measurement (GPM) Integrated Multi-satellite Retrievals for GPM (IMERG)) could be usefully adopted for monitoring the onset of the ISM and therefore extend its use to anticipate the potential anomalies of the seasonal length and seasonal rainfall anomalies of the ISM in many of the Indian meteorological sub-divisions. View Full-Text
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Thesis
Publisher
Place of Publication
Editor
Language
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
2072-4292
ISBN
Medium
Area
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Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ user @
Serial
1026
Permanent link to this record
Author
Bhardwaj, A. ; Misra, V. ; Mishra, A. ; Wootten, A. ; Boyles, R. ; Bowden, J. H. ; Terando, A. J.
Title
Downscaling future climate change projections over Puerto Rico using a non-hydrostatic atmospheric model
Type
$loc['typeJournal Article']
Year
2018
Publication
Climatic Change
Abbreviated Journal
Volume
147
Issue
1-2
Pages
133-147
Keywords
Abstract
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Series Editor
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ISBN
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Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
550
Permanent link to this record
Author
Buchanan, S. ; Misra, V. ; Bhardwaj, A.
Title
https://rmets.onlinelibrary.wiley.com/doi/10.1002/joc.5450
Type
$loc['typeJournal Article']
Year
2018
Publication
International Journal of Climatology
Abbreviated Journal
Volume
38
Issue
6
Pages
2651-2661
Keywords
Abstract
The integrated kinetic energy (IKE) of a tropical cyclone (TC), a volume integration of the surface winds around the centre of the TC, is computed from a comprehensive surface wind (National Aeronautics and Space Administration’s (NASA) cross‐calibrated multi‐platform [CCMP]) analysis available over the global oceans to verify against IKE from wind radii estimates of extended best‐track data maintained by NOAA for the North Atlantic TCs. It is shown that CCMP surface wind analysis severely underestimates IKE largely from not resolving hurricane force winds for majority of the Atlantic TCs, under sampling short‐lived and small‐sized TCs. The seasonal cycle of the North Atlantic TC IKE also verifies poorly in the CCMP analysis. In this article we introduce proxy IKE (PIKE) based on the kinetic energy of the winds at the radius of the last closed isobar (ROCI), which shows promise for a wide range of TC sizes including the smaller‐sized TCs unresolved in the CCMP data set.
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ISBN
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Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
551
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Author
Kipkogei, O. ; Bhardwaj, A. ; Kumar, V. ; Ogallo, L.A. ; Opijah, F.J. ; Mutemi, J.N. ; Krishnamurti, T.N.
Title
Improving multimodel medium range forecasts over the Greater Horn of Africa using the FSU superensemble
Type
$loc['typeJournal Article']
Year
2016
Publication
Meteorology and Atmospheric Physics
Abbreviated Journal
Meteorol Atmos Phys
Volume
128
Issue
4
Pages
441-451
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Abstract
Address
Corporate Author
Thesis
Publisher
Place of Publication
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Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
0177-7971
ISBN
Medium
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Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
82
Permanent link to this record
Author
Krishnamurti, T.N. ; Dubey, S. ; Kumar, V. ; Deepa, R. ; Bhardwaj, A.
Title
Scale interaction during an extreme rain event over southeast India
Type
$loc['typeJournal Article']
Year
2017
Publication
Quarterly Journal of the Royal Meteorological Society
Abbreviated Journal
Q.J.R. Meteorol. Soc
Volume
143
Issue
704
Pages
1442-1458
Keywords
scale interaction ; extreme rain ; southeast India
Abstract
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Series Editor
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Edition
ISSN
0035-9009
ISBN
Medium
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Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
65
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Author
Krishnamurti, T.N. ; Kumar, V. ; Simon, A. ; Bhardwaj, A. ; Ghosh, T. ; Ross, R.
Title
A review of multimodel superensemble forecasting for weather, seasonal climate, and hurricanes
Type
$loc['typeJournal Article']
Year
2016
Publication
Reviews of Geophysics
Abbreviated Journal
Rev. Geophys.
Volume
54
Issue
2
Pages
336-377
Keywords
multimodel ; superensemble ; ensemble mean
Abstract
Address
Corporate Author
Thesis
Publisher
Place of Publication
Editor
Language
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
8755-1209
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
83
Permanent link to this record
Author
Krishnamurti, T.N. ; Kumar, V. ; Simon, A. ; Thomas, A. ; Bhardwaj, A. ; Das, S. ; Senroy, S. ; Roy Bhowmik, S.K.
Title
March of buoyancy elements during extreme rainfall over India
Type
$loc['typeJournal Article']
Year
2017
Publication
Climate Dynamics
Abbreviated Journal
Clim Dyn
Volume
48
Issue
5-6
Pages
1931-1951
Keywords
Monsoon ; Mesoscale ; Buoyancy
Abstract
Address
Corporate Author
Thesis
Publisher
Place of Publication
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Summary Language
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Series Editor
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Series Issue
Edition
ISSN
0930-7575
ISBN
Medium
Area
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Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ mfield @
Serial
84
Permanent link to this record
Author
Kumar, V. ; Jana, S. ; Bhardwaj, A. ; Deepa, R. ; Sahu, S.K. ; Pradhan, P.K. ; Sirdas, S.A.
Title
Greenhouse Gas Emission, Rainfall and Crop Production Over North-Western India
Type
$loc['typeJournal Article']
Year
2018
Publication
The Open Ecology Journal
Abbreviated Journal
Volume
11
Issue
1
Pages
47-61
Keywords
Abstract
Background: This study is based on datasets acquired from multi sources e.g. rain-gauges, satellite, reanalysis and coupled model for the region of Northwestern India. The influence of rainfall on crop production is obvious and direct. With the climate change and global warming, greenhouse gases are also showing an adverse impact on crop production. Greenhouse gases (e.g. CO2, NO2 and CH4) have shown an increasing trend over Northwestern Indian region. In recent years, rainfall has also shown an increasing trend over Northwestern India, while the production of rice and maize are reducing over the region. From eight selected sites, over Northwestern India, where rice and maize productions have reduced by 40%, with an increase in CO2, NO2 and CH4 gas emission by 5% from 1998 to 2011. Results: The correlation from one year to another between rainfall, gas emission and crop production was not very robust throughout the study period, but seemed to be stronger for some years than others. Conclusion: Such trends and crop yield are attributed to rainfall, greenhouse gas emissions and to the climate variability.
Address
Corporate Author
Thesis
Publisher
Place of Publication
Editor
Language
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
1874-2130
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ user @
Serial
1024
Permanent link to this record
Author
Kumar, V. ; Jana, S. ; Bhardwaj, A. ; Deepa, R. ; Sahu, S.K. ; Pradhan, P.K. ; Sirdas, S.A.
Title
Greenhouse Gas Emission, Rainfall and Crop Production Over North-Western India
Type
$loc['typeJournal Article']
Year
2018
Publication
The Open Ecology Journal
Abbreviated Journal
TOECOLJ
Volume
11
Issue
1
Pages
47-61
Keywords
Greenhouse gases, CH4, Climate Variability, Emissions, Crop production, Rainfall.
Abstract
Background: This study is based on datasets acquired from multi sources e.g. rain-gauges, satellite, reanalysis and coupled model for the region of Northwestern India. The influence of rainfall on crop production is obvious and direct. With the climate change and global warming, greenhouse gases are also showing an adverse impact on crop production. Greenhouse gases (e.g. CO2, NO2 and CH4) have shown an increasing trend over Northwestern Indian region. In recent years, rainfall has also shown an increasing trend over Northwestern India, while the production of rice and maize are reducing over the region. From eight selected sites, over Northwestern India, where rice and maize productions have reduced by 40%, with an increase in CO2, NO2 and CH4 gas emission by 5% from 1998 to 2011. Results: The correlation from one year to another between rainfall, gas emission and crop production was not very robust throughout the study period, but seemed to be stronger for some years than others. Conclusion: Such trends and crop yield are attributed to rainfall, greenhouse gas emissions and to the climate variability.
Address
Corporate Author
Thesis
Publisher
Place of Publication
Editor
Language
Summary Language
Original Title
Series Editor
Series Title
Abbreviated Series Title
Series Volume
Series Issue
Edition
ISSN
1874-2130
ISBN
Medium
Area
Expedition
Conference
Funding
Approved
$loc['no']
Call Number
COAPS @ user @
Serial
1017
Permanent link to this record