Dear Nataraj subash

In a study we did with rice using the ORYZA model (Matthews, R. B. et al.
(1995). Modeling the Impact of Climate Change on Rice Production in Asia.
Wallingford, UK, IRRI/CAB International), the GCM scenarios gave predicted
monthly changes in solar radiation, temperature and rainfall due to climate
change, which were then used to modify current daily weather data files for
the particular site. In that case all the days in a specific month were
changed by the monthly value, but it would be possible to use some kind of
smoothing routine also.

It is not really a difficult problem - all you have to do is to prepare new
weather data files based on current weather data files, but with changes at
which ever timestep you have data for.

Robin Matthews.

-----Original Message-----
From: Nataraj subash
To: [log in to unmask]
Sent: 2003/04/01 15:39
Subject: Regarding climate change simulation on yield estimation

Dear all

I would like to study the impact of climate change scenario in our
region using crop growth simulation models.  But most of the
simulation models (CERES, ORYZA etc) estimate phenology, yield and
yield attributes, with the assumption that suppose 1 degree
increase of mean temperature means it considers adding of 1 degree
increase of temperature to the normal temperature from sowing to
harvest period.  But as for as the global temperature is
concerned, this assumption is somewhat true.  For regional level,
there may be increase of temperature during the initial period of
the crop ie. during tillering period after that there may be
decrease.  In that case, I would like all your attention, what
will be the next step and also how this can be solved?

Thanks to all

With regards,

N. Subash
Scientist (Agricultural meteorology)
ICAR Research Complex for Eastern Region
WALMI Complex
Phulwari Shariff P.O.
Patna 801 505
Bihar
India
Email : [log in to unmask]




_______________________________________________________________________
Odomos - the only  mosquito protection outside 4 walls -
Click here to know more!
http://r.rediff.com/r?http://clients.rediff.com/odomos/Odomos.htm&&odomo
s&&wn