Monthly Rainfall and NDVI, April, 2011 April 2011: Dekadal Normalized Difference Vegetation Index (NDVI) Map 7: 2nd Dekad (11-20) Map 8: 3rd Dekad (21-30) Map 6: 1st Dekad (1-10) Bari April 2011: Dekadal Rainfall Estimates (RFE) Map 4: 2nd Dekad (11-20) Map 5: 3rd Dekad (21-30) Map 3: 1st Dekad (1-10) Map 2: April 2011: Monthly Rainfall Estimates (mm) Food Security and Nutrition Analysis Unit - Somalia Observed rainfall data from most stations in Somalia during the month of April indicate that the Gu rains (April-June) started to pick up, though with some delays. Light to moderate rainfall was reported in Northwest, Central and South. The highest amount of rainfall of 65mm was recorded in Marere (Middle Juba), although it was still below the long-term mean for April (SWALIM rain gauge readings). However, Bardera received an unusually high amount of precipitation of 49.5mm compared to its Long Term Mean. According to FSNAU field reports, commencement of Gu rains is observed in most parts of the country. Satellite derived Rainfall Estimates (RFE) is also confirming that the Gu season rainfall is starting to build up, especially in southern and central parts of the country. Satellite-derived Normalized Difference Vegetation Index (Map 6-8) shows that vegetation is starting to improve, especially in Bay, Juba and Shabelle regions. It should also be noted that the index is clearly below average for most of southern and central Somalia, which is a result of prolonged dry conditions in these regions. According to FSNAU field reports, it is expected that the current rains would improve pasture and browse and eventually provide recovery to animals after an extended dry spell. This will, however, depend on the rainfall intensity and distribution in the successive weeks. The recent rains helped to replenish water catchments in pastoral and agropastoral areas. Therefore, water trucking has ceased in many areas. Remigration of livestock is reported from Lower Juba riverine and dheshek areas to key pastoral areas. Further analysis of the selected regions and districts are presented on page 3 and 4 of this update. Map 1: April 2011: Monthly Rain Gauge data (mm) ETHIOPIA Source: SWALIM This report is a compilation of climate data and field reports on Somalia that FSNAU and FEWSNET regularly review for analysis. For more information on data sources, please refer to page 2. Source: NOAA BARI SANAG SOOL NUGAL GALGADUD MUDUG M.SHABELLE Indian Ocean TOGDHEER Gulf of Aden W. GALBEED HIRAN L.SHABELLE DJIBOUTI GEDO L.JUBA M. JUBA ETHIOPIA AWDAL BAY BAKOOL Source: NOAA Gulf of Aden Bari Sanag W. Galbeed Togdheer Sool Nugal ETHIOPIA L. Juba M. Juba Bay L. Shabelle Galgadud Mudug Bakool Hiran Gedo DJIBOUTI Awdal Indian Ocean Gulf of Aden Bari Sanag W. Galbeed Togdheer Sool Nugal ETHIOPIA L. Juba M. Juba Bay L. Shabelle Galgadud Mudug Bakool Hiran Gedo DJIBOUTI Awdal Indian Ocean Gulf of Aden Bari Sanag W. Galbeed Togdheer Sool Nugal ETHIOPIA L. Juba M. Juba Bay L. Shabelle Galgadud Mudug Bakool Hiran Gedo DJIBOUTI Awdal Indian Ocean Map 6: 1st Dekad (1-10) Gulf of Aden Bari Sanag W. Galbeed Togdheer Sool Nugal ETHIOPIA L. Juba M. Juba Bay L. Shabelle Galgadud Mudug Bakool Indian Ocean M. Shabelle Hiran Gedo DJIBOUTI Awdal Gulf of Aden Bari Sanag W. Galbeed Togdheer Sool Nugal ETHIOPIA L. Juba M. Juba Bay L. Shabelle Galgadud Mudug Bakool Indian Ocean M. Shabelle Hiran Gedo DJIBOUTI Awdal Bari M. Shabelle M. Shabelle M. Shabelle Gulf of Aden Sanag W. Galbeed Togdheer Sool Nugal ETHIOPIA L. Juba M. Juba Bay L. Shabelle Galgadud Mudug Bakool Indian Ocean M. Shabelle Hiran Gedo DJIBOUTI Awdal Highlights
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Monthly Rainfall and NDVI, April, 2011
April 2011: Dekadal Normalized Difference Vegetation Index (NDVI)
Map 2: April 2011: Monthly Rainfall Estimates (mm)
Food Security and Nutrition Analysis Unit - Somalia
Observed rainfall data from most stations in Somalia during the month of April indicate that the Gu rains (April-June) started to pick up, though with some delays. Light to moderate rainfall was reported in Northwest, Central and South. The highest amount of rainfall of 65mm was recorded in Marere (Middle Juba), although it was still below the long-term mean for April (SWALIM rain gauge readings) . However, Bardera received an unusually high amount of precipitation of 49.5mm compared to its Long Term Mean. According to FSNAU field reports, commencement of Gu rains is observed in most parts of the country.
Satellite derived Rainfall Estimates (RFE) is also confirming that the Gu season rainfall is starting to build up, especially in southern and central parts of the country. Satellite-derived Normalized Difference Vegetation Index (Map 6-8) shows that vegetation is starting to improve, especially in Bay, Juba and Shabelle regions. It should also be noted that the index is clearly below average for most of southern and central Somalia, which is a result of prolonged dry conditions in these regions.
According to FSNAU field reports, it is expected that the current rains would improve pasture and browse and eventually provide recovery to animals after an extended dry spell. This will, however, depend on the rainfall intensity and distribution in the successive weeks.
The recent rains helped to replenish water catchments in pastoral and agropastoral areas. Therefore, water trucking has ceased in many areas. Remigration of livestock is reported from Lower Juba riverine and dheshek areas to key pastoral areas.
Further analysis of the selected regions and districts are presented on page 3 and 4 of this update.
Map 1: April 2011: Monthly Rain Gauge data (mm)
ETHIOPIA
Source: SWALIM
This report is a compilation of climate data and field reports on Somalia that FSNAU and FEWSNET regularly review for analysis. For more information on data sources, please refer to page 2.
Source: NOAA
BARISANAG
SOOL
NUGAL
GALGADUD
MUDUG
M.SHABELLE
Indian Ocean
TOGDHEER
Gulf of Aden
W. GALBEED
HIRAN
L.SHABELLE
DJIBOUTI
GEDO
L.JUBA
M. JUBA
ETHIOPIA
AWDAL
BAY
BAKOOL
Source: NOAA
Gulf of Aden
BariSanagW. Galbeed
Togdheer SoolNugal
ETHIOPIA
L. Juba
M. Juba
BayL. Shabelle
Galgadud
Mudug
Bakool Hiran
Gedo
DJIBOUTI
Awdal
Indian Ocean
Gulf of Aden
BariSanagW. Galbeed
Togdheer SoolNugal
ETHIOPIA
L. Juba
M. Juba
Bay
L. Shabelle
Galgadud
Mudug
Bakool HiranGedo
DJIBOUTI
Awdal
Indian Ocean
Gulf of AdenBari
SanagW. Galbeed
Togdheer SoolNugal
ETHIOPIA
L. Juba
M. Juba
Bay
L. Shabelle
Galgadud
Mudug
Bakool Hiran
Gedo
DJIBOUTI
Awdal
Indian Ocean
Map 6: 1st Dekad (1-10)Gulf of Aden
BariSanag
W. Galbeed
Togdheer Sool
NugalETHIOPIA
L. Juba
M. Juba
Bay
L. Shabelle
Galgadud
Mudug
Bakool Indian Ocean
M. Shabelle
Hiran
Gedo
DJIBOUTI
Awdal
Gulf of Aden
BariSanag
W. GalbeedTogdheer Sool
NugalETHIOPIA
L. Juba
M. Juba
Bay
L. Shabelle
Galgadud
Mudug
Bakool Indian Ocean
M. Shabelle
Hiran
Gedo
DJIBOUTI
Awdal
Bari
M. Shabelle M. ShabelleM. Shabelle
Gulf of Aden
SanagW. Galbeed
Togdheer SoolNugal
ETHIOPIA
L. Juba
M. Juba
Bay
L. Shabelle
Galgadud
Mudug
Bakool
Indian Ocean
M. Shabelle
Hiran
Gedo
DJIBOUTI
Awdal
Highlights
2
Table 1: April 2011: Observed rain gauge data compared to long term monthly averages
Map 9: April 2011: Rainfall as % of long term mean
Source: NOAA
Map 10: April 2011: NDVI absolute difference from long term mean
Primary data sources are NOAA/USGS, MARS-JRC, FSNAU and SWALIM. Maps and graphs on this bulletin are produced from four sources.
• Current Rainfall Estimates and NDVI data are derived from NOAA/CPC and DEVCOCAST (www.devcocast.eu) respectively, while the rain gauge data is collected by FAO-SWALIM and FEWSNET.
• The seasonal profiles on page 3 and 4 are produced in collaboration with JRC-MARS. For more information visit http://mars.jrc.europa.eu/mars/About-us/FOODSEC
For more information on NDVI, visit http://earlywarning.usgs.gov/adds and http://fsausomali.org/fileadmin/uploads/1308.pdf
For information on FOODSEC Action of JRC, please refer to http://mars.jrc.ec.europa.eu/mars/About-us/FOODSEC
Monthly rainfall and NDVI perfomance maps
The Mapped NDVI and RFE above represent the differences from Long Term Mean. SPOT-NDVI is presented as absolute difference from Long Term Mean for the same period (current - long term mean), while NOAA-RFE is presented as the relative difference from Long Term Mean (Current*100)/LTM.
Seasonal trend graphs
The maps and graphs on the following pages (3 & 4) are produced in collaboration with the FOODSEC Action of the Joint Research Centre of the European Commision. The graphs present seasonal trends of crop specific NDVI (Normalised Difference Vegetation Index) as lines and rainfall values (RFE) as bars for each of the delineated land cover and administrative units (regions and districts).For more information or request on available data, please send an email to [email protected].
*N/A indicates missing data
Galgadud
Bay
Mudug
Hiran
Nugal
Bakool
M. Shabelle
M. Juba
ETHIOPIA
Gulf of AdenDJIBOUTI
Awdal
Togdheer
Bari
SoolW. albeed
Gedo
L. Juba
L. Shabelle
Indian Ocean
Sanag
Source: NOAA
Galgadud
Bay
Mudug
Hiran
Nugal
Bakool
M. Shabelle
M. Juba
ETHIOPIA
Gulf of AdenDJIBOUTI
Awdal
Togdheer
SanagBari
Sool
W. Galbeed
Gedo
L. JubaL. Shabelle
Indian Ocean
Source: SPOT
Region Station_Name dek 1 dek 2 dek 3 Apr-11 LTM
Awdal Borama 0.0 4.5 17.0 21.5 104.0
Bari Bossasso 0.0 0.0 0.0 0.0 4.0
Bari Qardo 0.0 0.0 3.5 3.5 26.0
Sanaag Eeerigavo 0.0 0.0 0.0 0.0 39.0
Sool Caynabo 0.0 0.0 5.0 5.0
Sool Las Aanod 0.0 0.0 0.0 0.0 14.0
Togdheer Burao 0.0 0.0 0.0 0.0 47.0
Wogooyi Galbeed Hargeisa 0.0 10.5 15.5 26.0 85.0
Nugaal Garowe 0.0 0.0 25.0 25.0
Region Station_Name dek 1 dek 2 dek 3 Apr-11 LTMBay Baidoa 0.0 25.0 0.0 165.0Bay Diinsor 0.0 10.0 0.0 10.0 138.0