Latest Sea Ice and Global Temperature contents:
Update 15 July 2021
As noted here, I'll be away from my computer for a while, so this page will be irregularly updated, if at all. Sorry about that, but I'll be back.
|Monthly Global temperature indices|
|Table:||Latest Global Anomaly data|
|Report:||Latest Monthly TempLS Report (mesh weighted)|
|Graphs:||Global Temperature indices - graphs of recent months|
|Active Graph:||Global Temperature indices - Also backtrends. Many user choices.|
|Daily Reanalysis Temperatures|
|Table:||Recent days NCEP/NCAR reanalysis surface global average anomaly temperature|
|Active WebGL map:||Recent days NCEP/NCAR reanalysis surface global average anomaly temperature|
|Active map and plot:||Recent days NCEP/NCAR reanalysis regional Arctic temperatures|
|NH and SH Sea Ice data|
|Table:||Latest Sea Ice Extent - JAXA, NSIDC NH, NSIDC SH|
|Active graph:||Latest Sea Ice Extent - JAXA, NSIDC NH, NSIDC SH|
|Table:||Log of recently downloaded data files|
This automatically updated page has an embedded html window in which the numbers will appear. I check for data hourly. There is a log (bottom) which shows when data arrives, and also gives latest links.
Temperatures anomalies in the tables are as stated by the providers, with different anomaly bases. They have been converted to the same base (1981-2010) for plotting. The active plot has this common anomaly base
Sources and glossary:
Monthly global temperature anomaly dataHere is the latest global anomaly temperature data. An archive of this data, by month back to Dec 2016, is indexed here.
Here is the latest report from TempLS mesh weighted version. A reference on the Moyhu global temperature index (least squares) is here, with links to earlier posts. There is a Moyhu post each month on about 7th based on this report.
Here are some plots of temperature indices in recent times, set to a common anomaly base (1981-2010). Use buttons below the image to cycle through longer periods.
Here is an active plotter for global temperature indices, starting with to a common anomaly base of 1981-2010. Details of its operations are in a post here. You can vary the selection of plot data with the checkboxes. The legend bottom left is moveable, and intended to be placed on the plot for screen capture and image editing. Dragging in the plot area just translates the plots, but dragging below the x-axis stretches x, and similarly for y.
The plot also allows you to switch (toggle button "Trendback") to a mode which shows on the y-axis not the anomaly, but the trend from the x-axis time to the most recent data. In this mode you can't regress or smooth, and anomaly has no effect.
Daily Reanalysis Temperature data
Here is the latest NCEP/NCAR reanalysis (see post) surface temperature (°C) anomaly area-weighted average for recent months, and for days of the current month. The anomaly base years 1994-2013. You can find here an updated zip file of the daily and monthly values since 1994, with a readme file.
Here is a WebGL active map of this year's daily temperature anomalies. It has the usual trackball facilities. To get a specific day, let the mouse hover over the colored squares on the right; each square is a day, and the text top right tells you where you are. Click when you have the day that you want. The black squares at the top will give you a month average map. Details are at this post.
Update I have added buttons above the date selector which allow flipping through consecutive days to make a kind of movie.
Here is a tool for looking at daily Arctic temperatures. It is described in a post here. There is a lat/lon rectangle that you can manoeuver, and then press the "plot new" button to see a plot for that region of daily average temperatures (not anomalies), along with the 1994-2013 average. The domain is initially set to the region N of 80°.
NH and SH Sea Ice data
Here is the latest Arctic sea ice extent data. You can choose from JAXA Arctic Ice Extent, or from NSIDC NH or SH:
Here is an active polar plot of the Jaxa Ice extent data. Units are million sq km. You can click on the current region circle to get a magnification, or on any sector to see that part expanded. Clicking on the legend marks the year in dark; clicking on the central picture makes it go away. Details here.
And here is a log of the most recent data files to be posted. The links show the URL that was actually downloaded. The date on the left is the time marked on the file at origin, and the delay is the difference between that and the time of download and processing here. Sometimes that includes a delay between the date marked and when it became visible. NCEP/NCAR, for example, seems to have a six hour delay between the date marked and when it becomes available for download.