Peter Gibbs recently visited RHS Wisley to explore frost protection measures with Guy Barter, the RHS Chief Horticultural Adviser.
Watch the video here:
The maps above show the UK winter (Dec, Jan, Feb) averages for 1981-2010. The analyses are based on 1 km grid-point data sets which are derived from station data (Source: Met Office)
As we approach the winter season and temperatures start to dip, we take a look at winter weather in the UK – what affects it, seasonal extremes, what an ‘average’ winter looks like and link to some ‘wintry’ articles of interest.
Measuring humidity is easier than you might think, especially with modern day instruments.
Humidity is the amount of water vapour, an invisible gas, in the air. Warm air can ‘hold’ more water vapour than cold air; in fact air at 35°C can hold six times more water vapour as air at 5°C. All meteorological instruments measure the relative humidity (RH); this is the amount of water vapour in the air compared to the amount required to saturate it, given as a percentage - so completely saturated air has a RH of 100%.
Taking temperature measurements in your garden is a great way to start investigating microclimates. We take a look at some maximum-minimum thermometers on the market.
Just how cold did it get last night and how hot will it be this afternoon? You can measure these daily extreme temperatures in your own garden using a maximum-minimum thermometer. A variety of thermometers are available in high street stores, garden centres and online, ranging from the traditional to the hi-tech.
Every garden has a number of different microclimates, and these have an effect on not only the temperature but also the amount of rainfall and wind strength. Even within a small garden, there can be large differences in conditions. If you have been digging or weeding your garden for a while, you will probably have discovered hot, dry corners and cold, draughty spaces. Understanding the microclimates in your garden really gives you a head start. Most gardeners want light and shade, dry and damp, sheltered and exposed areas in which to grow different plants and create contrasting spaces.
Image: 'Steve' (Source: ESA - Dave Markel)
If Boaty McBoatface is anything to go by, social media has a lot to answer for when it comes to naming things for science. The most recent example of this is Steve; a recently discovered phenomenon all thanks to the power of social media and citizen scientists – something that wouldn’t have been possible 20 years ago.
The Royal Meteorological Society is currently running a short survey to find out about individuals using instruments and weather stations for personal use and how the information is recorded and shared.
Photo: The sighting came from Tofino on the west of Vancouver Island, Canada
Credit: Tofino Photography
The Royal Meteorological Soceity received these photographs this week, sent in from Tofino, on the west of Vancouver Island in British Columbia, Canada, asking for an explanation of how they are formed.
Image: Nacreous clouds over Aberdeen on 29th January
Credit: Stephane Gentile, Associate Fellow of the Royal Meteorological Society
Several rare sightings of nacreous clouds have been reported over the last few days, delighting cloudspotters, with photographs of the clouds coming from England and Scotland.