Tuesday, May 21, 2024

High resolution SST and movies of critical regions

About twelve years ago I did quite a lot of work with NOAA's AVHRR data on sea surface temperature anomaly. I wrote about it here and maintained an updated page here, with an active trackball globe. I then extracted certain regions of interest and posted movies of specific periods. This required projection from the sphere onto a flat surface.

All this was prepared in R and implemented in Javascript/WebGL. It worked, but was then at the limit of my skills and computing infrastructure, and some things stopped working after a while, and were difficult to fix. So I have done a complete re-write. I think the interface is more usable, and updating will be better.

The page is here. The standard movie controls are below the image, also shown below. The regions are:
  • E for tropical Pacific, intended to show ENSO effects
  • A for Arctic, centered on Pole
  • E for Antarctic, centered on Pole
  • N for Notrh Atlantic
  • P for North Pacific

You can choose one of the time intervals stated, click a radio button, and use the movie control to start and pause. Below the selection buttons is a slider to vary the frame speed. Default is 5 Hz, but the log scale goes from 1 to 25. The last row of buttons has about 800 frames at 4 day intervals, so you may want to speed up.



















Sunday, May 12, 2024

GISS April global temperature down by 0.07°C from March.

The GISS V4 land/ocean temperature anomaly was 1.32°C in April, down from 1.39°C in March. This fall is larger than the virtual tie reported here for TempLS.

As with TempLS, April was the warmest April in the record - next was 1.13°C in 2020.

As usual here, I will compare the GISS and earlier TempLS plots below the jump.

Thursday, May 9, 2024

April global surface TempLS down 0.004°C from March, but still warmest April in record.

The TempLS FEM anomaly (1961-90 base) was 1.178°C in April, very slightly down from 1.182°C in March. It was still the warmest April in the record, ahead of 1.009°C in 2020. The NCEP/NCAR reanalysis base index fell by 0.077°C.



Here is the corresponding stacked graph, showing how much hotter recent months have been:


Here is the temperature map, using the FEM-based map of anomalies. Use the arrows to see different 2D projections.






As always, the 3D globe map gives better detail. There are more graphs and a station map in the ongoing report which is updated daily.

Friday, April 12, 2024

GISS March global temperature down by 0.05°C from February.

The GISS V4 land/ocean temperature anomaly was 1.39°C in March, down from 1.44°C in February. This fall is smaller than the 0.11°C fall reported for TempLS.

As with TempLS, March was the warmest March in the record - next was 1.35°C in 2016. It was the fourth warmest month of all kinds.

As usual here, I will compare the GISS and earlier TempLS plots below the jump.

Monday, April 8, 2024

March global surface TempLS down 0.11°C from February, but still warmest March in record.

The TempLS FEM anomaly (1961-90 base) was 1.174°C in March, down from 1.284°C in February. It was still the warmest March in the record, just ahead of 1.138°C in 2016. The NCEP/NCAR reanalysis base index fell by 0.097°C.



Here is the corresponding stacked graph, showing how much hotter recent months have been, as well as the now completed year of 2023:


Here is the temperature map, using the FEM-based map of anomalies. Use the arrows to see different 2D projections.






As always, the 3D globe map gives better detail. There are more graphs and a station map in the ongoing report which is updated daily.

Wednesday, March 13, 2024

GISS February global temperature up by 0.22°C from January.

The GISS V4 land/ocean temperature anomaly was 1.44°C in February, up from 1.35°C in January. This rise is larger than the 0.165°C rise reported for TempLS.

As with TempLS, February was the warmest February in the record - next was 1.37°C in 2016.

As usual here, I will compare the GISS and earlier TempLS plots below the jump.

Thursday, March 7, 2024

February global surface TempLS up 0.163°C from January; warmest February in record.

The TempLS FEM anomaly (1961-90 base) was 1.256°C in February, up from 1.093°C in January. It was the warmest February in the record, ahead of 1.16°C in 2016. The NCEP/NCAR reanalysis base index rose by 0.061°C.

It was very warm in N America, most of Europe, and the Arctic. Cold patches in Central Asia and far NE Siberia. Antarctica was cold.
Here is the temperature map, using the FEM-based map of anomalies. Use the arrows at bottom to see different 2D projections.






As always, the 3D globe map gives better detail. There are more graphs and a station map in the ongoing report which is updated daily.



Here is the updated stacked plot of monthly values