In times when dinosaurs are forced to retire, what would a gecko do?

“The weakness of patrimonialism is that as it undermines bureaucracy, it “weakens and eventually cripples” the state. Competent people are replaced by obedient ones dependent on the ruler's support; corruption is accelerated as contractors and civil servants become accustomed to currying favor.”

We're pleased to announce the launch of our Ozonerates website (www.ozonerates.space). The platform is now live and fully equipped with an interactive map browser and data links, allowing users to explore satellite-constrained products such as PO3, sensitivity maps, NO2 and HCHO mixing ratios.

denial, anger(☑️), bargaining, depression, and acceptance.

“It just doesn’t seem like the opportunities are going to be there to be an effective scientist, and an effective person building the science community, in the U.S. anymore,” Dr. McDowell said. “I just don’t feel as proud to be an American as I used to be.” www.nytimes.com/2025/04/12/s...

I’m having a hard time making sense of all of this!

The new political climate has triggered a downward spiral in my career. At my lowest, NASA HQ has accepted my TEMPO science proposal, a mission that I have been eager to be part of for a long time. This chance feels like the universe saying, "Keep going.” I’m leaning into it, scars and all.

you’re fired. wait you’re rehired. email us a list of things you’ve done today wait forget it you’re fired again. come back your job was important. you’re fired. or hired. come in to the office. wait the office has no computers go home. we are the department of government efficiency.

Friendly reminder: if you are waiting on something from a US-based scientist/reviewer/editor, please realize that we're barely making it through each day putting out non-stop fires and trying not to collapse into tears. We're trying our best, but things will take longer right now. Give grace.

Long-term trends of NO2 mixing ratios within the PBL region inferred from OMI and MINDS (2005-2019) over my hometown, Tehran.

We establish a simple yet robust relationship between net PO3 and geophysical parameters obtained from several AQ campaigns. We show that remote sensing data can constrain these parameters, enabling us to produce the first global maps of PO3 with unprecedented resolution. doi.org/10.5194/acp-...

It hurts even more to leave your country ten years ago to escape hypocrisy and ignorance, only to face the same issues AGAIN.

It's hard to be motivated to talk about science these days, but it might be a good distraction. How well can a GSFC model (a quarter degree) convert NO2 columns to near-surface mixing ratios? We used 77 aircraft spirals at OMI revisit to answer it. It's fine, but there is still room for improvement:

After months of attempts, we parameterized ozone production rates based on measurable compounds by satellites without relying on HCHO/NO2. An L2-regularized DNN makes this isopleth, providing PO3 and the sensitivities for various envs (NOx-sensitive, VOC-sensitive, light-limited, water-limited, ..).

If you are frustrated by the current political environment, I encourage you to watch this video: How the US Is Destroying Young People’s Future | Scott Galloway | TED https://t.co/57OPsgXO96

[2/2] The outcomes won't be the same because of the non-linearity so they need to be averaged.

[1/2] Most non-linear model scenarios require at least two pathways. If we want to quantify the contrib of an emitter (A) to say, PM25, using a model, we have two options: i) including everything in the model minus w/o A, and ii) including A only minus the background. https://t.co/C9cNDueBnr

But, we have large inconsistencies among satellite-based tropospheric ozone retrievals, which prevent us from verifying if the models are capturing TO3 reasonably, especially in the southern hemisphere. This can, by itself, contribute to asymmetric issues in OH between SH/NH. https://t.co/TXNwvPFMn3

The first algorithm of satellite-constrained PO3 is out for discussion: https://t.co/HWeMmGB5LD

I'll give a talk tomorrow at the #QOS24 symposium in Boulder about our PO3 product informed by satellite and aircraft observations. I can't wait to see the mountains! #ozone #remotesensing #NASA https://t.co/Ss0Z8qtNZD

These structures were symbols of productivity and prosperity; now, they are the main contributors to premature death and rapidly changing climate change. https://t.co/g02ftdpBnZ

Anonymous poll: What is the biggest obstacle to academic success as an early career scientist? (too bad I couldn't add more than four options). @AcademicChatter #academia

What do you think? Out of HCHO, glyoxal (CHOCHO), and isoprene, HCHO takes the first place at better explaining the reactivity of VOCs during DISCOVER-AQs+KORUS-AQ+INTEX-B+SENEX+ATOMs. This ranking doesn't hold true for specific regions (i.e., high aromatic emiss). https://t.co/Q2VRWTLBNG

https://t.co/4HsbzHfvOl https://t.co/ItFNFu4b2Q

"I don't believe in satellite measurements". What if I correct their biases with more than 12,000 FTIR and MAX-DOAS paired observations for you? Thanks to my collaborators at @BIRA_IASB for getting this job done. We always need good benchmarks. https://t.co/4cu9qcL8ji

I'm eagerly looking forward to seeing people at @NASA_HAQAST @MIT in June to show our novel product, PO3 estimates from space. https://t.co/iOAqO40slP

An interesting chart based on https://t.co/5UlBiNAVs2. I wonder if cities in the U.S. were purposefully designed so people rely on cars. https://t.co/5iKWMNl4lr

My first visit to #EGU24 in #Vienna. Don’t forget to stop by my talk on Thursday (Room 1.85/86 at 11:20) and my poster on the same day(Hall X5 9-10:30 and 12-12:45). https://t.co/Wp9yDGceWr

The bimodal effect of solar eclipse on the solar power generation observed by my house. 😜 https://t.co/HoPZWMlHQm

Do you want to know more about our novel product, ozone production rates, from space? Please come to #EGU2024, where I'll show you how a blend of information from models, aircraft, and TROPOMI can create an informative product. Plus, I'll give a talk about OH drivers/biases: https://t.co/2PTIJOnoBp

Please check out my new discussion paper in ACPD. Our work reveals regional biases in OH of up to 20% using ML+satellite data. We have identified five variables - tropospheric ozone, NO2, HCHO, water vapor, and stra ozone - that can explain a 65% variance in the OH trend. https://t.co/5QPIuc31SZ

My upgraded GOESVisualizer python tool now is capable of making loop gifs over your desired region/time based on both GEOS-16 and GOES-17. Open-source at https://t.co/zdmYBb8rjk https://t.co/39dA4HHFAx

Truth! #AcademicTwitter #academia https://t.co/foOEOe73jI

San Francisco’s walkability score: ZERO! But love the scenery (and how aerosols may make prettier sunsets 😜). https://t.co/ztsqzNDEbR

It was nice to catch up with my former teammates last night! Their progress on #TEMPO and #GEMS is impressive! #AGU23 https://t.co/43CcqVwr8E

I hope to see many of you and new faces next week at #AGU23. I’ll present two posters related to i) the effect of sea breeze on HCHO vertical shape and its implication for GEO satellites and ii) the enhancement of OH simulations using information from OMI Aura. https://t.co/W2JLQpMSXy

Sometimes they don’t even look at! 😅 https://t.co/CqEZ9yxdlY

TROPOMI HCHO data over the US. Is it based on the average of several years of data? Is it based on months? No, it's just a month: 2020-08. Not only is it finer than OMI, but also it is more precise. @tropomi #airquality #satellites https://t.co/Vk6eqaegQA

Wetland methane emissions: https://t.co/rPryAQFb8X

Helpful instruction to be a better mentor/PI/manager. https://t.co/Xfk2zSXXQw

A new product from my previous team at @CenterForAstro shows a large dipole pattern in HCHO column trends in #SouthAmerica. The downward trends in HCHO in a large portion of the Amazon basin are likely caused by a decline in deforestation rates. #airquality #remotesensing https://t.co/GWW74DkQg5

Encouraging to see our ML agrees with Wolfe et al. 2019, suggesting that HCHO and OH are correlated in remote areas where the HCHO photolysis dominates over HCHO+OH. This means if you see higher HCHO levels over oceans, there must have been more OH to oxidize background VOCs. https://t.co/mFUUz9zsG5

When the middle-aged and elderly population say: "This summer, unlike any other in our memory", it is called #climatechange.

💡My new paper addresses challenges with simulating vertical shapes of HCHO in coastal areas affected by sea breezes, making it difficult to get accurate values from GEO satellites (@TEMPO_Mission) [link] https://t.co/tVrrMeO5KR @mattnasa18 @jgeddes85 @rkumar_ncar @kkno21 https://t.co/7dK3WPMsrB

Two new submissions to #AMTD: i) a new airborne sensor called #MethaneAIR, with unprecedented spatial resolution (20 m2) used to estimate #methane flux highly agreed with controlled releases (https://t.co/P0wIjjs1Qp), ii) a new trop BrO product from #OMPS https://t.co/Pyjtsafg4I

Rebuilding a country after a #war requires tremendous amount of energy, making war a large contributor to the growing #carbon footprint on our planet. #GlobalWarming #stopthewar

The # of months with at least one recorded observation from #OMI #NO2 columns in 2005-2019: certain areas may lack sufficient data samples due to factors like cloud, snow, and limited sensitivity of satellites. But, there are also regions with large # of samples. https://t.co/4GdWp4GRCO

Left: OH est. from a XGBoost machine trained by more than 40-yrs full chemistry model [𝐴𝑛𝑑𝑒𝑟𝑠𝑜𝑛 𝑒𝑡 𝑎𝑙. 2022, GMD] in July 2010, right: the sensitivity of OH to NO2; this reinforces the importance of getting NO2 correct to better represent OH and subsequently the tCH4. https://t.co/KTB2myIIUd

Rising tropospheric #ozone concentrations over #Asia and its impact on the background values in the west coast are evident based the MERRA2-GMI. https://t.co/SBlpKxfyeV

Why are HCHO levels going down over the southeast US? Temperature? Reduced anthropogenic NOx->reduced HCHO production from oxidation of VOCs? I see the signature of plants being under stress in 2011 (La Nina). https://t.co/znL3d5SCUk