Compare SA-OBS v2.0 and v1.0

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This page shows changes between SA-OBS v2.0 (released August 2018) and SA-OBS v1.0 (released April 2017). SA-OBS v2.0 spans 1981-01-01 to 2017-12-31 and SA-OBS v1.0 spans 1981-01-01 to 2014-08-31.

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Contents

Changes in input data


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Precipitation (RR)

Comparing DJF and JJA 2000

CompareSAOBS rr 0 25deg seasonalsums dec1999-nov2000 v2 0 saobs nc baselayers world polygons rr baselayers overlay 2000-01-31T00-00-00Z.png CompareSAOBS rr 0 25deg seasonalsums dec1999-nov2000 v2 0 saobs nc baselayers world polygons rr baselayers overlay 2000-07-31T00-00-00Z.png
CompareSAOBS rr 0 25deg seasonalsums dec1999-nov2000 v1 0 saobs nc baselayers world polygons rr baselayers overlay 2000-01-31T00-00-00Z.png CompareSAOBS rr 0 25deg seasonalsums dec1999-nov2000 v1 0 saobs nc baselayers world polygons rr baselayers overlay 2000-07-31T00-00-00Z.png

CompareSAOBS rr 0 25deg seasonalsums diff v2 0-v1 0 dec1999-nov2000 saobs nc baselayers world polygons rr baselayers overlay 2000-01-31T00-00-00Z.png CompareSAOBS rr 0 25deg seasonalsums diff v2 0-v1 0 dec1999-nov2000 saobs nc baselayers world polygons rr baselayers overlay 2000-07-31T00-00-00Z.png

The figures show DJF (left) and JJA (right) differences in precipitation amount (mm/3 months) for the year 2000 between SA-OBS v2.0 and v1.0. The differences correspond to areas where new series or stations have been included for the year 2000.

Difference in 1981-2010 climatology

CompareSAOBS rr yearsums 1981-2010 v2 0 saobs nc baselayers world polygons rr baselayers overlay 2010-07-15T12-00-00Z.png

CompareSAOBS rr yearsums 1981-2010 v1 0 saobs nc baselayers world polygons rr baselayers overlay 2010-07-15T12-00-00Z.png


CompareSAOBS rr 0 25deg diff yearsums 19812010 v2 0-v1 0 saobs nc baselayers world polygons rr baselayers overlay 2010-07-15T12-00-00Z.png

This figure shows the difference in annual 1981-2010 climatology for precipitation amount (mm/year) between SA-OBS v2.0 and v1.0. The differences correspond to areas where new stations or series have been included.

Standard deviation in daily differences

CompareSAOBS rr 0 25deg std daily v2 0-v1 0 saobs nc baselayers world polygons rr baselayers overlay 1997-12-31T12-00-00Z.png

This figure shows the standard deviation in daily differences for precipitation amount (mm/day) between SA-OBS v2.0 and v1.0. The differences correspond to areas where new stations or series have been included.


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Mean temperature (TG)

Comparing DJF and JJA 2000

CompareSAOBS tg 0 25deg seasonalmeans dec1999-nov2000 v2 0 saobs nc baselayers world polygons tg baselayers overlay 2000-01-31T00-00-00Z.png CompareSAOBS tg 0 25deg seasonalmeans dec1999-nov2000 v2 0 saobs nc baselayers world polygons tg baselayers overlay 2000-07-31T00-00-00Z.png
CompareSAOBS tg 0 25deg seasonalmeans dec1999-nov2000 v1 0 saobs nc baselayers world polygons tg baselayers overlay 2000-01-31T00-00-00Z.png CompareSAOBS tg 0 25deg seasonalmeans dec1999-nov2000 v1 0 saobs nc baselayers world polygons tg baselayers overlay 2000-07-31T00-00-00Z.png

CompareSAOBS tg 0 25deg seasonalmeans diff v2 0-v1 0 dec1999-nov2000 saobs nc baselayers world polygons tg baselayers overlay 2000-01-31T00-00-00Z.png CompareSAOBS tg 0 25deg seasonalmeans diff v2 0-v1 0 dec1999-nov2000 saobs nc baselayers world polygons tg baselayers overlay 2000-07-31T00-00-00Z.png

The figures show DJF (left) and JJA (right) differences in mean temperature (°C) for the year 2000 between SA-OBS v2.0 and v1.0. The differences correspond to areas where new series or stations have been included for the year 2000.

Difference in 1981-2010 climatology

CompareSAOBS tg yearmeans 1981-2010 v2 0 saobs nc baselayers world polygons tg baselayers overlay 2010-07-15T12-00-00Z.png

CompareSAOBS tg yearmeans 1981-2010 v1 0 saobs nc baselayers world polygons tg baselayers overlay 2010-07-15T12-00-00Z.png


CompareSAOBS tg 0 25deg diff yearmeans 19812010 v2 0-v1 0 saobs nc baselayers world polygons tg baselayers overlay 2010-07-15T12-00-00Z.png

This figure shows the difference in annual 1981-2010 climatology for mean temperature (°C) between SA-OBS v2.0 and v1.0. The differences correspond to areas where new stations or series have been included.

Standard deviation in daily differences

CompareSAOBS tg 0 25deg std daily v2 0-v1 0 saobs nc baselayers world polygons tg baselayers overlay 1997-12-31T12-00-00Z.png

This figure shows the standard deviation in daily differences for mean temperature (°C) between SA-OBS v2.0 and v1.0.

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