Daily sea ice extent updates resume with provisional data
NSIDC has obtained data from the DMSP F-18 satellite and is in the process of intercalibrating the F-18 data with F-17 data. Intercalibration addresses differences between the series of sensors, in order to provide a long-term, consistent sea ice record. While this work continues, we are displaying the uncalibrated F-18 data in the daily extent image. The daily time series graph shows F-17 data through March 31, and F-18 data from April 1 forward. Initial evaluation of the uncalibrated F-18 data indicates reasonable agreement with F-17, but the data should be considered provisional and quantitative comparisons with other data should not be done at this time.
Because these are provisional data, the Sea Ice Index has not been updated and continues to display only F-17 data through March 31. We expect to make the F-18 data available in Charctic soon.
For general information on the intercalibration of sensors, see the documentation for Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I-SSMIS Passive Microwave Data. This documentation will be updated when the intercalibration to F-18 is complete.
Likewise the Arctic and Antarctic comparison charts that I maintain have also not been updated since March 31.
Provisionally yesterday – Sunday the 8th of May 2016 – was the warmest 8th of May in Central England since at least 1878. The maximum temperature anomaly was +10°C warmer than the 1961-1990 long-term average for that day and was a full 2°C warmer than the previous warmest that occurred in 2008. The mean temperature was the highest since at least 1772 at 18.0°C and exceeded the previous highest mean of 1867 by 1.1°C. Quite an exceptionally warm day for early May.
I did try to give up blogging for a number of weeks, but it’s proved to be impossible, so I have bitten the bullet, and invested in 12 months hosting with FVSHosting and repurchased my xmetman.com URL so that I can host my very own xmetman WordPress site.
I found that I just need an internet presence where I can express myself and display my creations on, even if no one reads the blogs that I write, it will still provide me with an outlet and a reason for all the weather and climate programs that I’ve written over the years.