Samuel Brenner
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sdbrenner.bsky.social
Samuel Brenner
@sdbrenner.bsky.social
4.8K followers 1.3K following 20 posts
Postdoc at @caltech.edu studying sea ice-ocean interactions.
PhD in physical oceanography from the University of Washington.
🇨🇦(he/him)
https://sdbrenner.github.io/
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sdbrenner.bsky.social
Caltech has recommended that international scholars on H-1B visas (like myself) not leave the US.
Screenshot of an email from Caltech's international student services reading: "On September 19, 2025, the Presidential Proclamation Restriction on Entry of Certain Nonimmigrant Workers was issued. The proclamation requires H-1B employees who are seeking to enter the United States on or after September 21, 2025 to either have their employer pay a $100,000 supplemental fee or to receive a determination from the Department of Homeland Security that their entry is in the national interest and does not pose a threat to the security or welfare of the United States. Until further details are published about the national interest determination, we urge H-1B employees not to leave the United States. Similarly, any H-1B employees who are abroad, should attempt to return to the United States before midnight on September 20, 2025."
September 20, 2025 at 7:17 PM
sdbrenner.bsky.social
As a postdoc on the job market, I've been worried about the impact of ongoing funding/policy uncertainties on faculty positions. So I decided to compare the progression of faculty jobs this cycle to previous years based on positions posted to eswnonline.org/online/earth...
Line chart showing the cumulative number of Earth and Environmental Science faculty job postings by date added to the ESWN Jobs List for each hiring cycle from 2019–2020 through 2025–2026. The x-axis shows dates from April to August of the following year, and the y-axis shows the number of jobs (0–450). Each hiring cycle is represented by a line: earlier years (2019–2020 through 2024–2025) appear in progressively darker shades of blue, and 2025–2026 in red. Most years show rapid growth in postings from September to December, with totals levelling off by spring. The line for 2024–2025 shows a decreased growth after mid-November
September 16, 2025 at 6:29 PM
sdbrenner.bsky.social
That somewhat recalls the one-sentence introduction section from a Walter Munk paper
The image shows the title and introduction of a lecture paper, reading: Once Again—Tidal Friction Walter Munk (Harold Jeffreys Lecture delivered at Burlington House, 29 March 1968) 1. Introduction In 1920 it appeared that Jeffreys had solved the problem of tidal dissipation. We have gone backwards ever since.
October 2, 2024 at 6:17 PM
sdbrenner.bsky.social
I finally got around to adding a Bluesky profile link to my personal research website.
The image is a screenshot of a website featuring a navigation menu on the left side with sections: "home," "about me," "research," "publications," "curriculum vitae," and "'ocean robots' posters." Below these, icons link to email, GitHub, Bluesky, Instagram, and LinkedIn. On the right, there's a profile photo of me wearing a bright orange Mustang survival suit during Arctic research. Below my name, "samuel d. brenner," I'm identified as a "post-doctoral research associate at Caltech." A section titled "research" follows, describing my work on studying processes in the Arctic.
September 30, 2024 at 5:49 AM
sdbrenner.bsky.social
The deadline has been extended (by one day) due to their broken website.
Screenshot showing the text: CALL FOR AGU24 ABSTRACTS Abstract Deadline: 31 July 2024 23:59 EDT/03:59 +1 GMT UPDATE 31 JULY, 16:30 EDT: AGU is working to resolve issues with the membership site & member login. This issue is NOT affecting authors already logged in to the abstract submission site. Please check back for updates. Abstract submission will remain open until at least 13:59 ET on Thursday, 1 August for those facing technical problems. We apologize for any inconvenience caused.
July 31, 2024 at 8:48 PM
sdbrenner.bsky.social
I'll be at AGU23 next week presenting some of my postdoc work about sea ice floe-scale physics. I'd love to meet up with anyone who is going and broadly interested in sea ice-ocean interactions. Leave me a comment here, or get in touch with at [email protected].
An image of numerical model output showing a 50 km by 50 km x-y domain covered in realistically shaped sea ice floes (roughly 1600 floes of various sizes with a bulk ice concentration of 50%). The background the intensity of swirling ocean currents with a colourmap ranging from light to dark blue/teal (for speeds from 0 to 0.16 m/s). In various places, the ice floes are clustered together.
December 4, 2023 at 6:21 PM