Amir H. Souri

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.”

Explore Ozonerates From Space: : Get Informed About PO3 Products Determined from Space We have established a robust relationship between ozone production rates and several geophysical parameters obtained from several intensive atmospheric composition campaigns. We have shown that satell...

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.

Jonathan McDowell on Retiring From Harvard and Leaving the U.S. Jonathan McDowell is retiring from studying the universe. But he’s ramping up efforts to chronicle humanity’s exploration of space.

“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.

Especially for low-income states (mainly red) that are more susceptible to severe weather.

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:

Yes, we still rely on HCHO and NO2, but we don't need to use FNR to linearize the problem.

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