Annual Report 2009-2010 - Ministry Of Earth Sciences

Six among the 17-ensemble runs of QUMP
experiment are found to be reproducing mean
summer monsoon climate reasonably well
and these fields are used to drive the Regional
Climate Model (RCM)-PRECIS to generate 50
km grid scale under A1B Scenario (Medium
Emissions) runs over South Asia continuously
for the period 1961-2100.
The three-member ensemble runs of RCM-
PRESIS are completed and the results are
under critical evaluation and the simulations
in respect of the remaining 3-ensemble QUMP
members are currently underway. The results of
this RCM monsoon climate response are critical
components of the India’s National Climate
Change Assessment (INCCA) programme of the
Ministry of Environment and Forests (MoEF)
for generating various sectoral impacts due
to such projected changes of future monsoon
climate.
• A framework of three regional climate models
(PRECIS, WRF and Reg CM) is currently built
to examine the following spatial characteristics
associated with the summer monsoon in
coming decades up to 30-50 years.
a) To quantify future climate scenarios for
India under different emission scenarios
as well as “committed climate change”
scenarios, during the 21 st Century including
various intermediate time slices
b) To develop ensembles of regional
climate change scenarios and to quantify
uncertainties.
c) To examine the nature of possible changes
in the frequency and intensity of extreme
weather and monsoon climate variability
associated with the expected climate
change over India
8.2 Climate Monitoring and Climate
Information Services
IMD undertakes continuous global climate
monitoring and generation of climate diagnostics
for the Indian region to report major climate
variability and climate anomalies on monthly and
seasonal scale. Following are the major activities
of the climate monitoring and climate information
service:
• Detailed special monsoon reports are being
published every year.
• Generation of daily analysed rainfall data
(at 1°x1° latitude/longitude and at 0.5°x0.5°
latitude/longitude resolution – up to 2009)
• Generation of daily gridded temperature data
(at 1°x1° latitude/longitude resolution - up to
2005) for various climate variability studies
• Drought Monitoring Indices and Drought
Analysis
• Archival of climate related databases and data
products (district/station normal’s, normal’s
solar radiation parameters etc.)
The National Data Centre (NDC) is the national
repository of all meteorological data collected
on a routine basis and through special campaign
programmes. The total holding of meteorological
data in the archives as of date is 103.5 million
records. NDC received a lot of queries and
requests for data supply from numerous parties
that include government, private institutions,
industries, research and operational users. The
required data were retrieved from the computer
archives, within a short time and supplied to the
users on CDs, in printout forms in the desired
formats, following the usual formalities and as per
department policy. During the year, 1080.6 million
records were retrieved and supplied.
8.3 Monitoring Trace Gases
IMD is operating a Background Air Pollution
Monitoring Network (BAPMoN) programme
with an objective of documenting the long-term
changes in composition of trace species of the
atmosphere and the activity was brought under
Global Atmosphere Watch (GAW) in 1989. The
monitoring stations located at Allahabad, Jodhpur,
Kodaikanal, Minicoy, Mohanbari, Nagpur,
Port Blair, Pune, Srinagar and Visakhapatnam
continued to collect rain samples for chemical
analyses and measurement of atmospheric
turbidity. Wet precipitation samples, collected
Ministry of Earth Sciences : Annual Report 2009-10 51