Kevin Schwarzwald
@kschwarzwald.bsky.social
Not all those who wander are lost. Climate variability and impacts by day, cities by evening, rock violin by night (sometimes all three at once).
Oh I was trying to re-find this article and finally did: www.nytimes.com/2024/11/26/n...
Where this was the MTA’s response to a study about… air pollution
Where this was the MTA’s response to a study about… air pollution
September 7, 2025 at 11:55 PM
Oh I was trying to re-find this article and finally did: www.nytimes.com/2024/11/26/n...
Where this was the MTA’s response to a study about… air pollution
Where this was the MTA’s response to a study about… air pollution
It kills me that so many people on the NASA beat are space bois like Berger, who really don’t understand the worth of the earth science NASA does (and why NASA specifically does it) 🙄
August 16, 2025 at 7:47 AM
It kills me that so many people on the NASA beat are space bois like Berger, who really don’t understand the worth of the earth science NASA does (and why NASA specifically does it) 🙄
Also in case you haven’t seen the even prettier newish Munich U-Bahn Stock
July 15, 2025 at 1:47 PM
Also in case you haven’t seen the even prettier newish Munich U-Bahn Stock
Are they as wide as those on the American railjets* though 😩
*the new Siemens venture cars being used by Amtrak Midwest, and eventually everywhere else here
*the new Siemens venture cars being used by Amtrak Midwest, and eventually everywhere else here
July 13, 2025 at 4:27 PM
Are they as wide as those on the American railjets* though 😩
*the new Siemens venture cars being used by Amtrak Midwest, and eventually everywhere else here
*the new Siemens venture cars being used by Amtrak Midwest, and eventually everywhere else here
“Warning, this picture contains extreme views”
July 11, 2025 at 3:05 PM
“Warning, this picture contains extreme views”
Alternate theory: the Met Office feels bad about the Had models’ historical overuse in climate economics (done because it was in a too convenient format for them) and is over correcting ;)
(From Burke et al. 2015)
(From Burke et al. 2015)
June 16, 2025 at 1:01 PM
Alternate theory: the Met Office feels bad about the Had models’ historical overuse in climate economics (done because it was in a too convenient format for them) and is over correcting ;)
(From Burke et al. 2015)
(From Burke et al. 2015)
It’s been pointed out many times already, but there’s really no mystery in why Denver’s rail network has atrocious ridership despite the O($10 billion) pumped into it…
May 17, 2025 at 12:17 PM
It’s been pointed out many times already, but there’s really no mystery in why Denver’s rail network has atrocious ridership despite the O($10 billion) pumped into it…
“Self-propelled”?? You want the trains to just take themselves for a drive?? Absolute fantasy, smdh”
May 6, 2025 at 12:22 PM
“Self-propelled”?? You want the trains to just take themselves for a drive?? Absolute fantasy, smdh”
It gets worse, somehow:
www.cpr.org/2020/03/23/w...
www.cpr.org/2020/03/23/w...
May 2, 2025 at 10:16 PM
It gets worse, somehow:
www.cpr.org/2020/03/23/w...
www.cpr.org/2020/03/23/w...
65* even
(Somehow feels symbolic for Denver transpo policy…)
(Somehow feels symbolic for Denver transpo policy…)
May 2, 2025 at 10:10 PM
65* even
(Somehow feels symbolic for Denver transpo policy…)
(Somehow feels symbolic for Denver transpo policy…)
April 1, 2025 at 8:23 AM
Hey folks, I just released xagg==0.3.3, with a new backend that can result in a massive speedup for huge datasets.
Use
`with xa.set_options(impl='numba'):`
and let me know your results!
(I just got 2 orders of magnitude speedup on `xa.aggregate()` on a test )
#xagg #geopandas #xarray
Use
`with xa.set_options(impl='numba'):`
and let me know your results!
(I just got 2 orders of magnitude speedup on `xa.aggregate()` on a test )
#xagg #geopandas #xarray
February 17, 2025 at 7:06 PM
Hey folks, I just released xagg==0.3.3, with a new backend that can result in a massive speedup for huge datasets.
Use
`with xa.set_options(impl='numba'):`
and let me know your results!
(I just got 2 orders of magnitude speedup on `xa.aggregate()` on a test )
#xagg #geopandas #xarray
Use
`with xa.set_options(impl='numba'):`
and let me know your results!
(I just got 2 orders of magnitude speedup on `xa.aggregate()` on a test )
#xagg #geopandas #xarray
Paris’ Métro after seeing evidence of high PM pollution in the subway: our new MF19 trains have entirely electric brakes + air filters placed next to parts of the train likely to cause the most pollution
NYC’s @mta.info when faced with the same:
NYC’s @mta.info when faced with the same:
February 16, 2025 at 3:24 PM
Paris’ Métro after seeing evidence of high PM pollution in the subway: our new MF19 trains have entirely electric brakes + air filters placed next to parts of the train likely to cause the most pollution
NYC’s @mta.info when faced with the same:
NYC’s @mta.info when faced with the same:
I know that CEQA is flawed and often protects Reagan‘s idea of the environment more than the actual environment, but this is the most Anthropocene headline I have ever seen
January 12, 2025 at 4:51 PM
I know that CEQA is flawed and often protects Reagan‘s idea of the environment more than the actual environment, but this is the most Anthropocene headline I have ever seen
Tfw you're suddenly trying to give yourself crash courses in numba or cython or whatever it takes to make (previously within-memory) CONUS-scale analysis work in reasonable time on the 2 orders of magnitude larger scale of the globe...
December 5, 2024 at 7:08 PM
Tfw you're suddenly trying to give yourself crash courses in numba or cython or whatever it takes to make (previously within-memory) CONUS-scale analysis work in reasonable time on the 2 orders of magnitude larger scale of the globe...
But finally, how important are long-term trends in East African seasonal _means_, when most decisions are made interannually, and even by end of century in the strongest wetting simulations, interannual variability (which may itself change) still dominates the climate signal?
September 16, 2024 at 7:52 PM
But finally, how important are long-term trends in East African seasonal _means_, when most decisions are made interannually, and even by end of century in the strongest wetting simulations, interannual variability (which may itself change) still dominates the climate signal?
(3) These differences are largely in the ‘western V gradient’ region studied in excellent papers by Chris Funk et al. over the years as a driver of MAM droughts, which models have trouble simulating because of systematic biases in the tropical Pacific/ENSO region (Seager et al.)
September 16, 2024 at 7:51 PM
(3) These differences are largely in the ‘western V gradient’ region studied in excellent papers by Chris Funk et al. over the years as a driver of MAM droughts, which models have trouble simulating because of systematic biases in the tropical Pacific/ENSO region (Seager et al.)
Highlights: (1) While observed trends are never _outside_ the full range of CMIP6 model runs, multidecadal decreases in rainfall, like we saw in the 1980s-2000s, are systematically too rare in CMIP6 models compared to observations, just like they were in CMIP5 models.
September 16, 2024 at 7:51 PM
Highlights: (1) While observed trends are never _outside_ the full range of CMIP6 model runs, multidecadal decreases in rainfall, like we saw in the 1980s-2000s, are systematically too rare in CMIP6 models compared to observations, just like they were in CMIP5 models.
Es ist 13:50. Man muss zum Newarker ✈️ (einen der beiden mit Langstreckenflüge in NYC). Man schaut sich die Abfahrten an für das westliche S-Bahn-System der größten Stadt der USA an, das zum ✈️ fährt. Ja, das sind tatsächlich 2-Std-Lange Löcher im Samstagfahrplan. (Nur NEC, NJC Züge fahren zum ✈️)
December 9, 2023 at 7:21 PM
Es ist 13:50. Man muss zum Newarker ✈️ (einen der beiden mit Langstreckenflüge in NYC). Man schaut sich die Abfahrten an für das westliche S-Bahn-System der größten Stadt der USA an, das zum ✈️ fährt. Ja, das sind tatsächlich 2-Std-Lange Löcher im Samstagfahrplan. (Nur NEC, NJC Züge fahren zum ✈️)
To understand this variability and potential future changes, we need to understand why the rainy seasons happen when they do. We look at this in terms of large scale (in)stability - a metric h_s-h* (that we discuss more in the paper) that explains much of the rainfall. 4/9
September 25, 2023 at 3:56 PM
To understand this variability and potential future changes, we need to understand why the rainy seasons happen when they do. We look at this in terms of large scale (in)stability - a metric h_s-h* (that we discuss more in the paper) that explains much of the rainfall. 4/9
The climate of the Horn of Africa is incredibly unique - it's by far the driest land area of the tropics (barring maybe parts of the Brazilian sertão), and has 2 distinct rainy seasons (with 2 dry seasons) much farther from the equator than you usually find 2 seasonal peaks. 2/9
September 25, 2023 at 3:54 PM
The climate of the Horn of Africa is incredibly unique - it's by far the driest land area of the tropics (barring maybe parts of the Brazilian sertão), and has 2 distinct rainy seasons (with 2 dry seasons) much farther from the equator than you usually find 2 seasonal peaks. 2/9