A Rocha Portugal Observatory Report 2009-2010
A Rocha Portugal Observatory Report 2009-2010
A Rocha Portugal Observatory Report 2009-2010
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88 A <strong>Rocha</strong> <strong>Portugal</strong> <strong>Observatory</strong> <strong>Report</strong> <strong>2009</strong>-<strong>2010</strong><br />
Introduction<br />
CRUZINHA WEATHER REPORT <strong>2010</strong><br />
Reda Garmute<br />
Weather data has been recorded every day at Cruzinha, A <strong>Rocha</strong>’s field study centre, since<br />
September 2002 and continued throughout <strong>2010</strong>. The measurements were taken as close as<br />
possible to 9 am UTC and consisted of:<br />
Current temperature (˚C)<br />
Maximum and minimum temperatures for the previous 24 hours (˚C)<br />
Relative humidity (%)<br />
Rainfall over previous 24 hours<br />
Wind direction and strength (compass bearing, Beaufort scale and km/h)<br />
Cloud cover<br />
Visibility<br />
Additional notes<br />
Summary of the year <strong>2010</strong><br />
The maximum temperature, 41.5˚C, was recorded on 10 August.<br />
The minimum temperature, 1.9˚C, was recorded on 3 December.<br />
Total annual rainfall: 889.0 mm.<br />
Maximum rainfall in 24 hours: 50.0 mm on 25 December.<br />
Prevailing wind direction was N on 36 out of 351 days recorded.<br />
The maximum wind strength was level 4 on the Beaufort scale and was reached on six days<br />
in December-November.<br />
Air temperature and relative humidity<br />
<strong>2010</strong> was slightly warmer than <strong>2009</strong> but very similar to previous years. Average maximum<br />
temperatures in <strong>2010</strong> were 0.4˚C higher than in <strong>2009</strong> and average minimum temperatures were<br />
0.3˚C higher. The average maximum temperatures recorded in <strong>2010</strong> were very similar to previous<br />
years, excluding April and the hottest months of the year: July, August and September which showed<br />
much higher maximum temperatures than in previous years. The minimum temperatures recorded<br />
in <strong>2010</strong> varied more than maximum temperatures around the average of previous years this century.<br />
Throughout January - April the minimum temperatures were higher, whilst in June temperatures<br />
were lower. Changing again, the minimum temperature in August was higher, in October - lower and<br />
in December higher again.<br />
In <strong>2010</strong> the relative humidity was generally lower than in previous years. In particular, the summer<br />
months had a very low relative humidity both compared with other months, as expected, and when<br />
compared with previous years.
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