Rothamsted Research

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Rothamsted Weather Charts

Real-Time Measurement of Climatic Variables

At the beginning of 2014 the decision was taken to decommission the current ECN AWS (ECN AWS T06 01) and relocate to the existing Rothamsted Met Station, where climatic variables have been measured since 1853. To make the Rothamsted Met Station compatible with the outgoing ECN AWS additional instrumentation was installed. The new location is identified by the code ECN AWS T06 02.

Up until 2003 the Rothamsted Met Station was serviced by a dedicated team of scientists who would go out daily at 09:00 GMT to measure temperature (air and soil), rainfall, drainage, wind speed and wind direction, seven days a week, three hundred and sixty five (six) days a year. In 2004 the Rothamsted Met Station was fully automated with the manual equipment being replaced with a suite of electronic sensors and datalogger with direct access from a desktop computer.

The main change was replacing the standard five inch cylindrical rain gauge (Met Office type MK2) with a tipping bucket rain gauge (type ARG100), which was both aerodynamic and thermodynamic. These properties meant that wind eddies and loss of water through evaporation were reduced resulting in higher rain water capture. The ARG100 situated along side the MK2, in a sunken circular turf wall enclosure, has been estimated to capture approximately 10% more rainfall than the MK2.

The meteorological data presented in the charts below can be obtained from the electronic Rothamsted Archive and the ECN Data Centre.

Rothamsted Research has two other meteorological stations at Woburn Farm, Husband Crawley, Bedfordshire and Brooms Barn Research Station, Higham, Suffolk. Data from both these sites are obtainable through the electronic Rothamsted Archive.

Click on thumbnails in sections below to see charts (if charts are not up to date then press keys Ctrl and F5 together on keyboard to refresh cache). 

The hourly data is graphed (using Genstat 18th Edition) showing weekly, monthly and yearly summaries. The yearly summary is graphed against the 30 year mean (1981-2010), based on measurements made at the Rothamsted Meteorological Station, with the variability of the mean being shown using +/- one standard deviation.

Todays Weather

   Chart showing temperature of air and soil (degrees celcius), rainfall (millimetres), Wind speed (metres per seocnd) and direction (degress), relative humidity (percentage)Today's weather is observed from 00:00 to 24:00 GMT
   (to view table of current data click here)

    Temperature, °C: last hour - red column; previous hour - green pointer;
    maximum for day - orange pointer; minimum for day - blue pointer.

    Rainfall, mm: hourly and total - blue column .

    Wind Variables, m/s: last hour - purple arrow; previous hour - blue arrow

Air Temperature

Monthly mean hourly air temperature (degrees celcius) over last 28 daysMonthly: Hourly mean air temperature, °C. (Blue line) .


Maximum and minimum air temperature (degrees celcius) over last 28 daysMonthly: Daily maximum air temperature (Blue line) and minimum air temperature (Purple line), °C, are based on hourly mean air temperatures (09:00 to 09:00).


Daily Maximum and Minimum Temperatures (degrees celcius) over last 365 daysYearly: Blue Line : Daily Values, °C; Red Line : 30 year mean, 1981 to 2010; Grey Line : +/- one standard deviation representing the variability of the data used to calculate the thirty year mean.

Wind Vectors

Wind Speed (metres per second) and Direction (degrees) over last 28 daysMonthly: For weekly and monthly charts of wind vectors the most recent and penultimate wind speed and direction records are indicated by the purple and blue arrows, respectively. The arrows indicate the direction (°) from which the wind comes from. Earlier records are displayed using open circles. Data points are the average wind speed (m/s) for a given direction (averaged) over a one-hour period. The x- and y- axes represent wind direction and the distance of each point from the origin represents wind speed (concentric circles denote the wind speed intervals, m/s).


Wind Rose diagram of Speed (metres per second) and Direction (degrees) over last 365 daysYearly: Annual wind data are summarised on a rose diagram showing the distribution of winds according to their speed (m/s) and direction (°). Wind records are grouped by direction into 22.5° circular segments each with radius (length) corresponding to the number of wind records in the segment (expressed as a percentage of the 365 daily observations represented). Wind speeds are categorised according to the 'Key' (lower right-hand scale) and the proportion of all records of each speed occurring within each segment are denoted using the appropriate colours.

Rainfall

Hourly and Daily Rainfall over last 28 days (millimetres)Monthly: Hourly data: total rainfall, mm,  in an hour
Daily data: total rainfall, mm  (09:00 to 09:00).


Daily rainfall over last 365 days and accumulated annual rainfall for current and previous year (millimetres)Yearly: Blue Line: Daily rainfall, mm (09:00 to 09:00) and Accumulated daily rainfall, mm ; * Red Line: accumulated daily rainfall, 30 year mean (1981 to 2010 previously 1971-2000); Grey Line : +/- one standard deviation representing the variability of the data used to calculate the thirty year mean.

* The thirty year mean (1981 to 2010) for rainfall should be used only for guidance. During this period rainfall was measured using the the two different styles of rain gauges as menioned above.

Solar Radiation

Hourly solar energy over last 28 days (Watts per square metre)Monthly: Blue Line: hourly mean solar radiation, watts/m2.


Daily mean solar energy over last 365 days (watts per square metre)Yearly: Blue Line : Mean Daily Values, watts/m2 (00:00 to 24:00 GMT); Red Line : 30 year mean, 1981 to 2010 (previously 1971-2000); Grey Line : +/- one standard deviation representing the variability of the data used to calculate the thirty year mean.

Soil Temperature at 10cm under bare soil

Hourly Soil temperature (degrees celcius) at 10cm below bare soil over last 28 daysMonthly: Blue Line: hourly mean soil temperature at 10cm below bare soil.


Daily mean soil temperature (degrees celcius) at 10cm below bare soil over last 365 daysYearly: Blue Line: Daily Values; Red Line: 30 year mean, 1981 to 2010 (previously 1971-2000); Grey Line : +/- one standard deviation representing the variability of the data used to calculate the thirty year mean.

Soil Temperature at 30cm under grass

Hourly soil temperature (degrees celcius) at 30 cm below grass over last 28 daysMonthly: Blue Line: hourly mean soil temperature at 30cm below grass.


Daily mean soil temperature (degrees celcius)  at 30 cm below grass over last 365 daysYearly: Blue Line: Daily Values; Red Line: 30 year mean, 1981 to 2010 (previously 1971-2000); Grey Line : +/- one standard deviation representing the variability of the data used to calculate the thirty year mean.

 

Climatic information

Rothamsted Met Station Climate

Weather for Woburn

Chart of temperature, rainfall and wind vectors Woburn Weather Charts