Hourly meteorological observations of Batavia/Jakarta in ... 1/Brandsma_Batavia_April2012.pdf ·...

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Theo Brandsma KNMI, the Netherlands International workshop on the digitization of historical climate data the new SACA&D databases and climate analysis in the Asian region Citeko, Bogor, Indonesia, 2-5 April 2012 Hourly meteorological observations of Batavia/Jakarta in the 1866-1980 period

Transcript of Hourly meteorological observations of Batavia/Jakarta in ... 1/Brandsma_Batavia_April2012.pdf ·...

Theo BrandsmaKNMI, the Netherlands

International workshop onthe digitization of historical climate data

the new SACA&D databases and climate analysis in the Asian region

Citeko, Bogor, Indonesia, 2-5 April 2012

Hourly meteorological observations of Batavia/Jakarta in the 1866-1980 period

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Didah

1.Yearbooks with hourly data of Batavia/Jakarta (1866-1980)

2.Yearbooks with daily rainfall (1879-1916)

3.Yearbooks with monthly rainfall characteristics (1917-1965)

4.Yearbooks with monthly/annual data of secondary stations

(1910-1973)

5.Post 1970 data

Didah data sources

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Background of the observatory and the measurements

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Background of the observatory and the measurements

Situation of Batavia/Jakarta

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Background of the observatory and the measurements

Batavia/Jakarta in 1866

Observatory •

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Jakarta today

Background of the observatory and the measurements

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Background of the observatory and the measurements

Map of the observatory (1924)

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1.Temperature

2.Rainfall

3.Air pressure

4.Relative humidity

5.Wind direction

6.Wind speed (from 1879 onwards)

7.Cloudiness (from 1880 onwards)

Main measured/observed meteorological variables

Background of the observatory and the measurements

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Background of the observatory and the measurements

Thermometer screen

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Digitization and quality control

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Digitization and quality control

Example from the yearbooks

1.Scanning2.OCR3.Quality control4.Database

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Some results

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Batavia/Jakarta annual mean temperature (1866-1980)

1860 1880 1900 1920 1940 1960 1980 2000year

25.0

25.5

26.0

26.5

27.0

27.5

28.0

Tem

pera

ture

(°C

)

Some results

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Batavia/Jakarta diurnal cycle changes (1866-1980)

0 2 4 6 8 10 12 14 16 18 20 22 24hour

24

25

26

27

28

29

30

Tem

pera

ture

(°C

)

1866-18901891-19201921-19501951-1980

Some results

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Population growth in Batavia/Jakarta 1870-2010

1860 1880 1900 1920 1940 1960 1980 2000year

105

106

107

45678

2

3

45678

2

3

45678

popu

latio

n

Some results

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0 2 4 6 8 10 12 14 16 18 20 22 24hour

0.0

0.2

0.4

0.6

0.8

1.0

Rai

nfal

l (m

m)

1866-18751876-1885

Batavia/Jakarta diurnal rainfall cycle changes (1866-1885)

Some results

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1. Validation of climate models

2. Construction of baseline climate and development of climate

scenarios

3. Study of long term climate trends and variability

4. Study of the impact of the urban heat island on climate

variables in Batavia/Jakarta

Possible applications of the dataset

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