[30-hPa Summer Temp.] [Section 4] [Section 2] [Introduction] [Documents] [Data] [Start]

3 Climatological Monthly Means

3.1 Monthly Mean Temperatures at 30 hPa

3.2 Monthly Mean Geopotential Heights at 30 hPa


3 Climatological Monthly Means (M. Kunze)

Climatological data (for a 30-year and 37-year period) are included on the CD, for the three levels 100, 50 and 30 hPa in both horizontal resolutions (cf. Section 8.2.3).

For the 5 x 5 resolution on the 50- and 30-hPa level the early years from 1964 - 1974 have been extrapolated from 10N to the equator.

This was done by Barbara Naujokat on the base of the individual monthly mean maps with the aid of the monthly mean values of some equatorial stations and the thermal wind relationship arising from the QBO.

With these extrapolated data is was possible to calculate a 30-year long-term monthly mean on the 5 x 5 grid. From July to December the long-term mean is calculated for the period 1964 - 1993 and for the months from January to June the long-term mean is calculated for the period 1965 - 1994.

These 30-year long-term mean data served as base for the calculation of a 37-year mean, the longest period possible for both temperature and height from the Berlin data. As an example, 30-hPa maps for this period are shown in Section 3.1 and 3.2.

3.1 Monthly Mean Temperatures at 30 hPa

The climatological northern hemispheric temperature distribution on the 30-hPa level, from 10N to 90N, is shown in Fig. 23 for the summer season and in Fig. 24 for the winter season.

The long-term mean is calculated for the 37-year period. For the months from July to December, the mean is based on the years 1964 - 2000 and from January to June on the years 1965 - 2001.

The position of the highest and lowest temperatures are marked with (W) and (C).

30 hPa: 37-year Climatological Monthly Mean Temperatures
Summer SeasonWinter Season
MayNovember
JuneDecember
JulyJanuary
AugustFebruary
SeptemberMarch
OctoberApril

30-hPa temperature anomalies for the winter seasons from 1964/65 to 2000/01 are documented separatly on the CD.

3.2 Monthly Mean Geopotential Heights at 30 hPa

The climatological northern hemispheric geopotential height fields on the 30-hPa level are documented here for the same period (cf. Section 3.1).

The position of the highest and lowest geopotential heights are marked with (H) and (L).

30 hPa: 37-year Climatological Monthly Mean Geopotential Heights
Summer SeasonWinter Season
MayNovember
JuneDecember
JulyJanuary
AugustFebruary
SeptemberMarch
OctoberApril

[30-hPa Summer Temp.] [Section 4] [Section 2] [Introduction] [Documents] [Data] [Start]

Stratospheric Research Group
Last modified: Wed Sep 11 22:34:52 MST 2002