International Workshop on Rescue & Digitazion of Climate Records in the Mediterranean Basin28-30 November 2007

We have carried out a comprehensive but approximate evaluation of the available long data series in the National Climatological Data Base at INM. The variables studied have been precipitation and temperature, on both the monthly and daily basis.

The climatological data series have been stratified by year of beginning (ten year blocks) up to 1960 and approximate percentage of missing data.

In order to make the computations easier some simplifications have been used. For example the different stations indicators with the same root have been considered as belonging to the same long series. And there are cases where in a given month there are daily missing data but since the monthly record is present we have not considered the month as missing for daily data. But we estimate these cases to be rather scarce.

International Workshop on Rescue & Digitazion of Climate Records in the Mediterranean Basin28-30 November 2007

Long daily temperature series

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<=1900 1901-1910 1911-1920 1921-1930 1931-1940 1941-1950 1951-1960

Year of beginning

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International Workshop on Rescue & Digitazion of Climate Records in the Mediterranean Basin28-30 November 2007

Long daily temperature series, classified by percentage of missing data

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<2 Entre 2 y 5 Entre 5 y 10 Entre 10 y 20 > 20

Missing data (%)

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International Workshop on Rescue & Digitazion of Climate Records in the Mediterranean Basin28-30 November 2007

Long temperature series, classified by starting year and percentage of missing data

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<=1900 1901-1910 1911-1920 1921-1930 1931-1940 1941-1950 1951-1960

Year of beginning

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<5%

>5%

International Workshop on Rescue & Digitazion of Climate Records in the Mediterranean Basin28-30 November 2007

Daily temperature

# of series with rate of missing data (%)# of series

Starting year <2 Entre 2 y 5 Entre 5 y 10 Entre 10 y 20 > 20

<=1900 2 3 2 1 0 8

1901-1910 5 2 2 3 1 13

1911-1920 1 1 3 8 36 49

1921-1930 2 1 6 6 30 45

1931-1940 22 24 14 19 42 121

1941-1950 22 20 11 9 46 108

1951-1960 24 15 8 23 32 102

Sums 78 66 46 69 187 446

International Workshop on Rescue & Digitazion of Climate Records in the Mediterranean Basin28-30 November 2007

Monthly temperature

# of series with rate of missing data (%)# of series

Starting year <2 Entre 2 y 5 Entre 5 y 10 Entre 10 y 20 > 20

<1900 14 6 5 4 9 38

1901-1910 7 1 2 1 1 12

1911-1920 5 1 6 8 37 57

1921-1930 2 1 4 7 29 43

1931-1940 12 24 12 20 43 111

1941-1950 25 17 9 10 43 104

1951-1960 27 16 17 32 50 142

Sums 92 66 55 82 212 507

International Workshop on Rescue & Digitazion of Climate Records in the Mediterranean Basin28-30 November 2007

Long daily precipitation series

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<=1900 1901-1910 1911-1920 1921-1930 1931-1940 1941-1950 1951-1960

Starting year

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International Workshop on Rescue & Digitazion of Climate Records in the Mediterranean Basin28-30 November 2007

Long daily precipitation series, classified by percentage of missing data

0

100

200

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<2 Entre 2 y 5 Entre 5 y 10 Entre 10 y 20 > 20

Missing data (%)

# o

f se

ries

International Workshop on Rescue & Digitazion of Climate Records in the Mediterranean Basin28-30 November 2007

Long precipitation series, classified by starting year and percentage of missing data

0

50

100

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<=1900 1901-1910 1911-1920 1921-1930 1931-1940 1941-1950 1951-1960

Year of beginning

# o

f s

tati

on

s

<5%

>5%

International Workshop on Rescue & Digitazion of Climate Records in the Mediterranean Basin28-30 November 2007

Daily precipitation

# of series with rate of missing data (%)# of series

Starting year <2 Entre 2 y 5 Entre 5 y 10 Entre 10 y 20 > 20

<=1900 0 6 1 1 0 8

1901-1910 7 2 2 1 4 16

1911-1920 4 9 19 34 165 231

1921-1930 4 11 20 29 148 212

1931-1940 30 37 47 58 129 301

1941-1950 105 82 73 109 167 536

1951-1960 92 72 51 52 102 369

Sums 242 219 213 284 715 1673

International Workshop on Rescue & Digitazion of Climate Records in the Mediterranean Basin28-30 November 2007

Mothly precipitation

# of series with rate of missing data (%)# o f series

Starting year <2 Entre 2 y 5 Entre 5 y 10 Entre 10 y 20 > 20

<=1900 15 5 7 8 5 40

1901-1910 6 6 5 1 3 21

1911-1920 15 12 25 38 154 244

1921-1930 7 13 19 29 141 209

1931-1940 37 31 41 58 120 287

1941-1950 134 79 69 102 144 528

1951-1960 156 97 100 128 159 640

Sums 370 243 266 364 726 1969

International Workshop on Rescue & Digitazion of Climate Records in the Mediterranean Basin28-30 November 2007

The activity in the field of generating long homogeneous series at INM has received recently an important boost in connection with a project launched by the Spanish Environment Ministry to generate climate change regional scenarios. Within this project there is a part devoted to climate data which includes the generation of long temperature and precipitation homogeneous series. This part will be coordinated by Univ. Rovira i Virgili, and the Climatology Area of the INM will be one of the partners.

International Workshop on Rescue & Digitazion of Climate Records in the Mediterranean Basin28-30 November 2007

Mahón ‘Aeropuerto de Menorca’ B893

Univ B804A MAHON PRIETO Y CAULES: Dato mensual de 1888 a 1925

Univ B804B MAHON BASE NAVAL: Dato mensual de 1926 a 1939

Univ B804C MAHON-PLAZA EXPLANADA: Dato mensual de 1939 a 1970

Univ B893 Misma estación INM: Dato mensual de 1965 a 2001

INM B893 De enero de 1965 a junio de 1974 hay dato diario con lagunas, resúmenes grabados y errores; desde julio de 1974 hay dato diario.

INM B804A MAHON ‘PRIETO Y CAULES’: dato mensual de 1881 a 1925

INM B804B MAHÓN ‘BASE NAVAL’: dato mensual de 1926 a enero de 1939

INM B804C MAHÓN ‘PLAZA EXPLANADA’: dato mensual de febrero de 1939 a octubre de 1970

Acción propuesta: Prolongar hacia atrás la serie de la B893

An example of a long series with different measuring sites

International Workshop on Rescue & Digitazion of Climate Records in the Mediterranean Basin28-30 November 2007

Another example of a long series with several sites

4. Barcelona ‘Aeropuerto de El Prat’ 0076 (Estación GCOS)

Univ 0076 Misma estación INM: dato mensual desde 1938 a 2001

Univ 0201E BARCELONA-UNIVERSIDAD: dato mensual desde 1869 a 1936 y dato diario de 1885 a 1925

Univ 0200E BARCELONA-FABRA: dato mensual de 1926 a 2001 y dato diario en el mismo periodo

INM 0076 Dato diario de: marzo 1924 a noviembre 1927, de julio 1938 a diciembre 1938 y desde enero de 1944

INM 0200E BARCELONA ‘FABRA’: dato diario desde 1926, con lagunas los años 1980, 81 y 82; los datos entran con retraso (no están los dos últimos meses)

INM 0201E BARCELONA ‘UNIVERSITAT’: dato mensual de 1869 a julio de 1936

Acción propuesta: Prolongar hacía atrás la serie de la 0076

International Workshop on Rescue & Digitazion of Climate Records in the Mediterranean Basin28-30 November 2007

Metadata

Recently there has been a clear growth in the interest in and demand for metadata by the users of climatological data.

There are specifice input screens for metadata in the Climatological Data Base of INM with Oracle system.

Currently we are making efforts to recover old metadata, specifically the displacements of stations, which give rise to new station indicators.

There are problems due to the sharing of responsabilities in metadata managemente between different units at INM.

A new very important challenge is the automatization of the climatological network with the related issues of homogeneity: need of overlap between manual and automatic stations.

International Workshop on Rescue & Digitazion of Climate Records in the Mediterranean Basin28-30 November 2007

Metadatos (1)

International Workshop on Rescue & Digitazion of Climate Records in the Mediterranean Basin28-30 November 2007

Metadatos (2)

International Workshop on Rescue & Digitazion of Climate Records in the Mediterranean Basin28-30 November 2007

Metadatos (3)