@ZLabe@fediscience.org
@ZLabe@fediscience.org avatar

ZLabe

@ZLabe@fediscience.org

Climate Scientist (Atmospheric) PhD | Postdoc at Princeton University & NOAA GFDL | UC Irvine and Cornell University alum | Sharing data-driven stories | Be kind | Views are my own |

My research and communication interests coincide with disentangling patterns of climate change from climate variability using data-driven methods. Also, scary movie fan!

#Arctic #ClimateChange #DataViz #MachineLearning #OpenScience #Python #SciComm #Weather #wxMastodon #wxTwitter

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ZLabe, to worldwithoutus
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46 years of sea ice thickness during the month of February.

Graphic available at https://zacklabe.com/arctic-sea-ice-volumethickness/

ZLabe, to random
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The freeze-up continues in the after the annual minimum was reached a few weeks ago. Sea-ice extent is unusually low, but is well above the previous record for the current date.

Graphic from https://zacklabe.com/antarctic-sea-ice-extentconcentration/. Data from https://nsidc.org/data/seaice_index.

ZLabe, to random
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Comparison of monthly temperature anomalies in the Arctic versus the Antarctic so far in 2024 (yellow lines). The other lines show the monthly anomalies for years from 1940 (blue) to 2023 (red)

Data from https://cds.climate.copernicus.eu/cdsapp#!/dataset/reanalysis-era5-single-levels-monthly-means?tab=overview

Line graph time series of monthly mean surface temperature anomalies for the Antarctic region only. Every month is shown from 1940 to 2024. There is a long-term warming trend in all months of the year, but less obvious than the other regions.

ZLabe, to random
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A great summary of our workshop this week on learning how to make your research matter for communicating climate change: https://sites.temple.edu/tusustainability/2024/03/27/making-your-research-matter-communicating-for-the-climate/

ZLabe, to worldwithoutus
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Have a great weekend! Here's your Friday ice update - sea ice extent is currently the 15th lowest on record (JAXA data)...

• about 260,000 km² above the 2010s mean
• about 130,000 km² below the 2000s mean
• about 660,000 km² below the 1990s mean
• about 980,000 km² below the 1980s mean

Other plots: https://zacklabe.com/arctic-sea-ice-extentconcentration/

ZLabe, to random
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Loss of relative thicker February sea ice from 1979 to 2024...

Note that I have masked out sea ice <1.5 meters in order to emphasize the decline of the (relative) thicker ice. Data from PIOMAS. Graphic from https://zacklabe.com/arctic-sea-ice-volumethickness/

Animation of polar stereographic maps showing Arctic sea ice thickness for each February from 1979 to 2024 using shades of purple, pink, orange, and white color shading. The scale here is measured from 1.5 to 5 m of sea ice thickness. There is large spatial variability, but a long-term decreasing trend in nearly all areas. Only a small area of thicker ice remains north of Greenland in 2024.

ZLabe, to worldwithoutus
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100 years of March sea ice... sea ice reaches its annual maximum extent in March (seasonal cycle).

It's always incredible to compare the southern extent of sea ice, which reaches 45°N latitude in the Sea of Okhotsk (western Pacific).

Data info: https://carbonbrief.org/guest-post-piecing-together-arctic-sea-ice-history-1850

Animation of polar stereographic maps showing Arctic sea ice concentration for every March from 1918 to 2017. There is a long-term decreasing trend in recent years around the ice edge and substantial interannual variability through the entire dataset.

ZLabe, to random
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Comparing vertical cross-sections of March temperature trends in the Southern Hemisphere versus Northern Hemisphere...

Find the climate change indicators of tropospheric warming (https://science.org/doi/10.1126/science.aas8806) and stratospheric cooling (https://pnas.org/doi/10.1073/pnas.2300758120).

Graphic showing a vertical cross-section of zonal mean temperature trends in the Northern Hemisphere for March from 1979 through 2022. There is a long-term warming trend in the troposphere and cooling in the stratosphere. Red shading is shown for warming trends, and blue shading is shown for cooling trends.

ZLabe,
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@dgfeist This is likely due to the very high variance in the stratospheric polar vortex, which can tip a linear least squares trend, so I suspect it is not statistically robust.

ZLabe, to random
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Revisiting mean temperature departures over the last 3 months around the world...

🟥 warmer than average
🟦 colder than average

Data information/questions addressed at https://data.giss.nasa.gov/gistemp/faq/

ZLabe, to worldwithoutus
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Simulated reconstruction of March sea ice thickness since 1901. Interannual variability and a decline in recent years.

Information about this dataset is available at https://doi.org/10.1175/JCLI-D-19-0008.1. Note that the data is only available through 2010 due to use of ERA-20C forcing.

Animation of polar stereographic maps showing Arctic sea ice thickness for each March from 1901 through 2010. There is large interannual variability and a long-term decrease in recent years. Thickness ranges from 0 to 5 meters on this graphic with shades of blue, purple, pink, yellow, and white.

ZLabe, to worldwithoutus
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Transition time of year... central (e.g. >80°N) continues to be very cold for weeks after the annual sea-ice extent max. However, this max is reached in March due to melting sea ice in the marginal seas - note how far south they extend! Graphic at https://zacklabe.com/arctic-climate-seasonality-and-variability/.

ZLabe, to random
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My climate change dashboard is updated for this past month...

Higher resolution graphic available at https://zacklabe.com/climate-change-indicators/

ZLabe,
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@lymphomation Sorry, but I do not provide any graphics with that background.

ZLabe, to random
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A closer look at the anomalous warmth (temperatures >8°C above the 1981-2010 average) stretching from northern Siberia toward the North Pole during February 2024.

Data from https://cds.climate.copernicus.eu/cdsapp#!/dataset/reanalysis-era5-single-levels-monthly-means?tab=overview

ZLabe, to worldwithoutus
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Visualizing temperature anomalies across the over the last 12 months...

Data from ECMWF ERA5 reanalysis.

ZLabe, to worldwithoutus
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2024 observed the 14th lowest annual maximum sea ice extent.

This maximum was set 2 days later than the 1981-2010 average.

For more official information: https://nsidc.org/arcticseaicenews/2024/03/arctic-sea-ice-reaches-a-below-average-maximum/

ZLabe, to worldwithoutus
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Have a good week! Here's your Monday ice update - sea ice extent is currently the 15th lowest on record (JAXA data)...

• about 180,000 km² above the 2010s mean
• about 280,000 km² below the 2000s mean
• about 760,000 km² below the 1990s mean
• about 1,180,000 km² below the 1980s mean

Plots: https://zacklabe.com/arctic-sea-ice-extentconcentration/

ZLabe, to worldwithoutus
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Changes in February sea ice volume since the year 1901...

Comparison between PIOMAS-20C and PIOMAS data sets now updated through 2024 with data information available at https://doi.org/10.1175/JCLI-D-19-0008.1. This graphic is available at https://zacklabe.com/arctic-sea-ice-volumethickness/.

ZLabe, to random
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Last month was the warmest February on record even when averaged for both the Northern and Southern Hemispheres separately.

Data information at https://data.giss.nasa.gov/gistemp/faq/. Code for the raw data at https://data.giss.nasa.gov/gistemp/sources_v4/.

White line graph time series of global mean surface temperature anomalies for each Northern Hemisphere February from 1880 through 2024. There is a long-term increasing trend and large year-to-year variability. A 30-year lowess smoothing line is also shown with a red line. The mean surface temperature anomaly in February 2024 was 1.95°C for the Northern Hemisphere. Anomalies are computed relative to a 1951-1980 climate baseline.

ZLabe, to random
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Patterns of March surface air temperatures in the averaged by decade using ERA5. Note that there are larger uncertainties in observational products across this region.

Data from https://cds.climate.copernicus.eu/cdsapp#!/dataset/reanalysis-era5-single-levels-monthly-means?tab=overview

ZLabe, to worldwithoutus
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Most of the is experiencing warming temperatures over the last four decades in March. This is largest in the Barents Sea region and corresponds to losses of sea ice cover (turbulent fluxes).

[Data from ECMWF ERA5. For more info: https://doi.org/10.1175/BAMS-D-23-0079.1]

ZLabe, to random
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And now looking at the temperature anomalies in the Southern Hemisphere over the last month (left), 3 months (center), and 12 months (right)...

Data from https://cds.climate.copernicus.eu/cdsapp#!/dataset/reanalysis-era5-single-levels-monthly-means?tab=overview

ZLabe, to random
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Temperature anomalies over the last month (left), 3 months (center), and 12 months (right) in the Northern Hemisphere...

Data from ECMWF ERA5 reanalysis at https://cds.climate.copernicus.eu/cdsapp#!/dataset/reanalysis-era5-single-levels-monthly-means?tab=overview

ZLabe, to random
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ICYMI - the most recent monthly mean measurements of carbon dioxide (CO₂) and methane (CH₄)...

I also just added the CO₂ growth rate chart to update yearly on my climate change indicators website: https://zacklabe.com/climate-change-indicators/

For more data: https://gml.noaa.gov/ccgg/trends/

Line graph time series of monthly global carbon dioxide and methane abundance from January 1984 through 2024. There are seasonal cycles and long-term increasing trends for both greenhouse gases. Current carbon dioxide levels are at 425 ppm, and current methane levels are at 1934 ppb.

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