19.05.2013 Views

A Rocha Portugal Observatory Report 2009-2010

A Rocha Portugal Observatory Report 2009-2010

A Rocha Portugal Observatory Report 2009-2010

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

A <strong>Rocha</strong> <strong>Portugal</strong> <strong>Observatory</strong> <strong>Report</strong> <strong>2009</strong>-<strong>2010</strong> 83<br />

CRUZINHA WEATHER REPORT <strong>2009</strong><br />

Andrew Cole<br />

Introduction<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>2009</strong>. The measurements are taken at 09:00 UTC and<br />

consist 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>2009</strong><br />

The maximum temperature, 40.0˚C, was recorded on 21 June.<br />

The minimum temperature, -2.5˚C, was recorded on 9 January.<br />

Total annual rainfall: 616.5mm.<br />

Maximum rainfall in 24 hours: 61.5mm.<br />

Prevailing wind direction was NW on 52 of 333 days recorded.<br />

The maximum wind strength was level 4 on the Beaufort scale which only occurred on 4<br />

February.<br />

Air temperature and relative humidity<br />

<strong>2009</strong> was slightly warmer than 2008 but very similar to previous years. Average maximum<br />

temperatures in <strong>2009</strong> were 0.5˚C higher than in 2008 and average minimum temperatures were<br />

0.9˚C higher. January had much lower maximum temperatures than average while March had much<br />

higher maximum and minimum temperatures; April had lower temperatures. June had higher<br />

minimum temperatures and August had higher maximum temperatures than average. October,<br />

November and December saw generally higher temperatures than average. In <strong>2009</strong> the relative<br />

humidity was generally lower than in previous years with the exception of January and February. In<br />

particular the summer months had very low relative humidity both compared with other months, as<br />

expected, and when compared with previous years.

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!