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Century-scale Time Series of Regional Rainfall Anomalies in Africa in CDIAC, Trends '93
Entry ID: CDIAC_HULME2_PRECIP_TRENDS


Summary
Abstract: The annual time series of regional rainfall anomalies for Africa have
been constructed by Hulme using the global monthly precipitation
dataset held in the Climatic Research Unit (CRU) at the University of
East Anglia.

The CRU dataset consists of historical time series of monthly
precipitation for more than 8200 stations worldwide, of which 2150 lie
within Africa. Time series of regional rainfall anomalies over three
regions for about the last 100 years were produced using individual
station time series. The three regions are:

Sahel (defined as the portion of sub-Saharan Africa that received
100-600 mm mean annual rainfall over the period 1931-1990)

East Africa (Uganda, Kenya, and Tanzania

Southwestern Africa (the area that received 100-600 mm mean annual
rainfall over the period 1931/32 - 1990/91).

Annual rainfall anomalies for these regions are expressed as rainfall
anomaly indices (RAI's) which are calculated from individual
stations' standardized rainfall.

The citation for this dataset is:

Hulme, M. 1994. "Century-scale time series of regional rainfall
anomalies in Africa", pp. 964-973. In T.A. Boden, D.P. Kaiser,
R.J. Sepanski, and F.W. Stoss (eds.), Trends '93: A Compendium of Data
on Global Change. ORNL/CDIAC-65. Carbon Dioxide Information Analysis
Center, Oak Ridge National Laboratory, Oak Ridge, TN, USA

The Hulme African precipitation data is available via ftp from:

"ftp://cdiac.esd.ornl.gov/pub/trends93/precip"

CDIAC has provided an anonymous FTP area to all data files, retrieval
codes, and descriptive files for all data available in CDIAC's
anonymous FTP in pub/trends93/co2. The FTP address is
CDIAC.ESD.ORNL.GOV and 128.219.24.36 and input your email address as
the password. The data bases are arranged as subdirectories in
/pub/trends93/ (co2, ch4, trace, emiss, precip, and temp) that
correspond to major chapter headings in Trends '93. The data files are
arranged as xxxxx.yyy where xxxxx is the name of the station, country,
site, region, or principle investigator and yyy is the page number in
Trends '93 (example: vostok.009 refers to the Vostok ice core dataset
as tabulated on page 9.

Geographic Coverage
 N: 40.0 S: -40.0  E: 50.0  W: -20.0

Temporal Coverage
Start Date: 1884-01-01
Stop Date: 1991-12-31


Location Keywords
CONTINENT > AFRICA > EASTERN AFRICA > KENYA
CONTINENT > AFRICA > EASTERN AFRICA > TANZANIA
CONTINENT > AFRICA > EASTERN AFRICA > UGANDA
CONTINENT > AFRICA
CONTINENT > AFRICA > EASTERN AFRICA
GEOGRAPHIC REGION > SAHEL
CONTINENT > AFRICA > SOUTHERN AFRICA


Science Keywords
ATMOSPHERE >PRECIPITATION >PRECIPITATION AMOUNT    [Definition]
ATMOSPHERE >PRECIPITATION >PRECIPITATION ANOMALIES    [Definition]
ATMOSPHERE >PRECIPITATION >LIQUID PRECIPITATION >RAIN    [Definition]


ISO Topic Category
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE


Keywords
EAST AFRICA
FTP
GLOBAL WARMING
PRECIPITATION ANOMALIES
SAHEL
SOUTHWESTERN AFRICA
TRENDS'93


Originating Center
CDIAC


Data Center
Carbon Dioxide Information Analysis Center, Environmental Sciences Division, Oak Ridge National Laboratory, U. S. Department of Energy    [Information]
Data Center URL: http://cdiac.ornl.gov/
Dataset ID: hulme.968
Dataset ID: hulme.970
Dataset ID: hulme.972

Data Center Personnel
Name: CARBON DIOXIDE INFORMATION ANALYSIS CENTER
Fax: (865) 574-2232
Contact Address:
Carbon Dioxide Information Analysis Center (CDIAC)
Oak Ridge National Laboratory
P.O.. Box 2008
City: OAK RIDGE
Province or State: TENNESSEE
Postal Code: 37831-6335
Country: USA



Distribution
Distribution_Media: ftp


Personnel
MIKE HULME
Role: INVESTIGATOR
Phone: +44 1603 593162
Fax: +44 1603 507784
Email: m.hulme at uea.ac.uk
Contact Address:
Climatic Research Unit
School of Environmental Studies
University of East Anglia
City: Norwich
Province or State: Norfolk
Postal Code: NR4 7TJ
Country: United Kingdom


GENE R. MAJOR
Role: DIF AUTHOR
Email: gsfc-gcmduso at mail.nasa.gov


Publications/References
Barring, L., and M. Hulme. 1991. "Filters and approximate confidence
intervals for interpreting rainfall anomaly indices", Journal of
Climate, Vol. 4, pp. 837-847.

Boden, T.A., D.P. Kaiser, R.J. Sepanski, and F.W. Stoss (eds.). 1994. 'Trends '93: A compendium of data on global change',ORNL/CDIAC-65, Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, Oak Ridge, TN.

Folland, C.K., J.A. Owen, M.N. Ward, and A.W. Colman. 1991. "Prediction of seasonal rainfall in the Sahel region using empirical and dynamical methods", Journal of Forecasting, Vol. 10, pp. 21-56.

Hulme, M. 1994. "Century-scale time series of regional rainfall anomalies in Africa", pp. 964-973. In T.A. Boden, D.P. Kaiser, R.J. Sepanski, and F.W. Stoss (eds.), Trends '93: A Compendium of Data on Global Change. ORNL/CDIAC-65. Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, Oak Ridge, TN, USA

Hulme, M. 1992. "Rainfall changes in Africa: 1931-60 to 1961-90",
International Journal of Climatology, Vol. 12, pp. 685-699.

Hulme, M., R. Marsh, and P.D. Jones. 1992. "Global changes in a humidity index between 1931-60 and 1961-90", Climate Research, Vol. 2, pp. 1-22.

Nicholson, S.E. 1993. "An overview of African rainfall fluctuations of
the last decade", Journal of Climate, Vol. 6, pp. 1463-1466.

Rowell, D.P., C.K. Folland, K. Maskell, J.A. Owen, and M.N. Ward. 1991. "Causes and predictibility of Sahel rainfall variability", Climate Research Technical Note No. 12, Hadley Centre, Bracknell, U.K.

Tyson, P.D., T.G.J. Dyer, and M.N. Mametse. 1975. "Secular changes in
South African rainfall: 1880-1972", Quarterly Journal of the Royal
Meteorological Society, Vol. 101, pp. 817-833.

Tyson, P.D. 1991. "Climatic change in southern Africa: Past and present conditions and possible future scenarios", Climatic Change, Vol. 18, pp. 241-258.

Creation and Review Dates
Last DIF Revision Date: 2016-01-27



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