Atmospheric Sciences
@atmsciences.bsky.social
Weather and Climate; Stratosphere, UV, AQ, methane; hydrogen; EU CAMS, ESA remote sensing etc ; employed at knmi.nl ; If we would change, climate wouldn’t need to; @MichielvanWeele.bsky.social
In this piece @carbonbrief.org still reports the warming by methane based on its increase in abundance (~25% of warming, and not the more correct much larger share in the emission-based methane forcing. Source: IPCC AR6. Do not forget #troposphericozone and other chemistry
October 12, 2025 at 5:50 PM
In this piece @carbonbrief.org still reports the warming by methane based on its increase in abundance (~25% of warming, and not the more correct much larger share in the emission-based methane forcing. Source: IPCC AR6. Do not forget #troposphericozone and other chemistry
‘Circular cirrus’ (contrails caused by circling aircraft) over The Netherlands observed with MTG
October 2, 2025 at 8:34 PM
‘Circular cirrus’ (contrails caused by circling aircraft) over The Netherlands observed with MTG
Global, Chinese and other CO2 emission trends compared to US
September 13, 2025 at 2:50 PM
Global, Chinese and other CO2 emission trends compared to US
August 7, 2025 at 5:22 PM
The relative contribution of US CO2 emissions to global CO2 emissions is not the same anymore as 70-80 years ago, so the world’s rapid climate action and renewable transformation is now more relevant than stalling US climate policies
July 29, 2025 at 9:30 PM
The relative contribution of US CO2 emissions to global CO2 emissions is not the same anymore as 70-80 years ago, so the world’s rapid climate action and renewable transformation is now more relevant than stalling US climate policies
Interesting results in the CAMS Air Quality assessment report 2024 on the source apportionment for the traditional dirty fossil ports of Rotterdam and Antwerp. The largest sectoral contribution during the 2 studied episodes stems
from…. agriculture(!)
from…. agriculture(!)
July 22, 2025 at 4:54 PM
Interesting results in the CAMS Air Quality assessment report 2024 on the source apportionment for the traditional dirty fossil ports of Rotterdam and Antwerp. The largest sectoral contribution during the 2 studied episodes stems
from…. agriculture(!)
from…. agriculture(!)
The reconstructed path of the 14 July 1975 whirlwind based on damage reports.
July 13, 2025 at 6:08 AM
The reconstructed path of the 14 July 1975 whirlwind based on damage reports.
14 July 1975. Groningen area. Reconstruction of the path of a whirlwind / light tornado. Maybe the strength of a whirlwind or tornado could be estimated from historical damage reports. Many trees seemed still standing up in this case.
July 13, 2025 at 6:04 AM
14 July 1975. Groningen area. Reconstruction of the path of a whirlwind / light tornado. Maybe the strength of a whirlwind or tornado could be estimated from historical damage reports. Many trees seemed still standing up in this case.
Independent opinion on this Bluesky account as formulated by Perplexity
June 29, 2025 at 5:39 PM
Independent opinion on this Bluesky account as formulated by Perplexity
This week the highest UV index in N-W Europe because of high solar elevation, lots of sunshine, and a high pressure system that brings a thinner ozone layer (higher tropopause level) to the region. In a worldperspective the European highest UV indices are not extreme of course
June 28, 2025 at 6:28 AM
This week the highest UV index in N-W Europe because of high solar elevation, lots of sunshine, and a high pressure system that brings a thinner ozone layer (higher tropopause level) to the region. In a worldperspective the European highest UV indices are not extreme of course
Drivers of the extreme North Atlantic marine
heatwave during 2023
heatwave during 2023
June 11, 2025 at 5:42 AM
Drivers of the extreme North Atlantic marine
heatwave during 2023
heatwave during 2023
Spatial pattern of observed temperature trends from the surface to the stratosphere from January 2002 to December 2021
May 30, 2025 at 7:17 PM
Spatial pattern of observed temperature trends from the surface to the stratosphere from January 2002 to December 2021
Ozone obervations today inline #Utrecht #Griftpark
May 13, 2025 at 4:26 PM
Ozone obervations today inline #Utrecht #Griftpark
April 23, 2025 at 2:22 PM
Water zonal mean latitudinal profile versus time at 26.1 hPa (~25 km). #mls #hungatonga
April 23, 2025 at 2:10 PM
Water zonal mean latitudinal profile versus time at 26.1 hPa (~25 km). #mls #hungatonga
Forest–atmosphere exchange of reactive nitrogen in a remote region – Part I: Measuring temporal dynamics
February 21, 2025 at 10:15 PM
Forest–atmosphere exchange of reactive nitrogen in a remote region – Part I: Measuring temporal dynamics
Ever tried to plot our best estimate global methane emissions (AR6 IPCC; SSP3-7.0) against the observed global mean methane concentration? In the figure the interesting result since 1850 (sorry, captions are in dutch). It was a bumpy ride lately, but not anymore it seems. Guess what happened.
February 7, 2025 at 9:03 PM
Ever tried to plot our best estimate global methane emissions (AR6 IPCC; SSP3-7.0) against the observed global mean methane concentration? In the figure the interesting result since 1850 (sorry, captions are in dutch). It was a bumpy ride lately, but not anymore it seems. Guess what happened.
Just released by TNO an 18-year European dataset of anthropogenic #emissions targeted at air quality modellers. CAMS-REG version 8.0 is now available for the years 2005-2022, Data available via ECCAD
lnkd.in/eVt6gwmb
lnkd.in/eVt6gwmb
January 29, 2025 at 5:22 AM
Just released by TNO an 18-year European dataset of anthropogenic #emissions targeted at air quality modellers. CAMS-REG version 8.0 is now available for the years 2005-2022, Data available via ECCAD
lnkd.in/eVt6gwmb
lnkd.in/eVt6gwmb
Comparison of 2024 vs competing baselines: pre-industrial climate modeling (left) based vs ERA5 reanalysis (right)
January 22, 2025 at 8:31 PM
Comparison of 2024 vs competing baselines: pre-industrial climate modeling (left) based vs ERA5 reanalysis (right)
De natuurbranden in Los Angeles door de ogen van EarthCARE - KNMI www.knmi.nl/over-het-knm...
January 17, 2025 at 1:00 PM
De natuurbranden in Los Angeles door de ogen van EarthCARE - KNMI www.knmi.nl/over-het-knm...
Kind of tipping point. Above 35-40 degrees leaf temperature photosynthesis slows down significantly reducing the carbon uptake by a mature tropical forest nph.onlinelibrary.wiley.com/doi/epdf/10....
January 16, 2025 at 10:02 PM
Kind of tipping point. Above 35-40 degrees leaf temperature photosynthesis slows down significantly reducing the carbon uptake by a mature tropical forest nph.onlinelibrary.wiley.com/doi/epdf/10....
The figure shared by Robert shows for 2023 and 2024 (and in contrast to 2022) hardly any swv enhancement at altitudes relevant for climate forcing
November 29, 2024 at 8:35 AM
The figure shared by Robert shows for 2023 and 2024 (and in contrast to 2022) hardly any swv enhancement at altitudes relevant for climate forcing