[Grad-postdoc-assn] Fwd: ATOC Colloquium – Prof. Kris Karnauskas (ATOC) – Friday, Sept. 2 at 11am (SEEC S228 and Zoom)

Scott Briggs sbriggs at ucar.edu
Thu Sep 1 08:18:03 MDT 2022 

FYI

---------- Forwarded message ---------
From: atoc-colloquium (Andrew Winters) <atoc-colloquium at lists.colorado.edu>
Date: Thu, Sep 1, 2022 at 7:58 AM
Subject: Re: ATOC Colloquium – Prof. Kris Karnauskas (ATOC) – Friday, Sept.
2 at 11am (SEEC S228 and Zoom)
To: atoc-faculty (Alexandra Jahn) <atoc-faculty at lists.colorado.edu>,
atoc-students (Julie Lundquist) <atoc-students at lists.colorado.edu>,
atoc-researchers (Kelly Duong) <atoc-researchers at lists.colorado.edu>,
Atoc-majors at lists.colorado.edu <atoc-majors at lists.colorado.edu>,
Atoc-minors at lists.colorado.edu <atoc-minors at lists.colorado.edu>,
atoc-colloquium at lists.colorado.edu <atoc-colloquium at lists.colorado.edu>


Hi everyone,

A reminder that we will hold the first ATOC colloquium of the academic year
on *Friday, September 2 at 11am MT over Zoom and in SEEC S228*. This week's
colloquium will feature a seminar from ATOC professor *Kris Karnauskas*
entitled, *"Upwelling and Equatorial Islands: Old Theories and the Ocean
Data Revolution*".* The zoom login information and abstract for
the colloquium are provided below. Please join us for coffee and
conversation beginning at 10:45am MT, and stay afterwards for a lunch
catered by Illegal Pete's.*

We look forward to seeing you tomorrow!

-The ATOC Colloquium Committee

_________________________________________________


*Upwelling and Equatorial Islands: Old Theories and the Ocean Data
Revolution *
Kris Karnauskas (ATOC)

Wind-driven upwelling is the stuff of 20th century legends from Ekman to
Wyrtki. Along the equator in the open ocean, easterly trade winds peel the
surface away and cold, nutrient-rich water rises from depth. Islands, on
the other hand, are flies in the ointment. Hotspots of marine productivity
and biodiversity near equatorial island chains, fueled by upwelling
velocities an order of magnitude greater than in the open ocean, challenge
the textbook theories. Our nascent understanding of equatorial islands and
their relationship with the ocean circulation delays our ability to predict
(and protect) crucial tropical marine ecosystems. First, we will use the
global Argo array of profiling floats to reveal the spatial scales and
provenance of upwelling at two distinct equatorial island chains (Galápagos
and Gilberts). Argo measurements resolve a clear subsurface thermal
fingerprint of vertical divergence at the depth of the Equatorial
Undercurrent (EUC), confined to within 100 km of both island chains. This
signal at the Galápagos is well reproduced by a high-resolution ocean
reanalysis, enabling estimation of vertical velocities balancing the
convergence of the EUC upon the islands. Next, we will investigate the
curious observation that the waters off the Galápagos have been cooling
over the satellite era. Using the aforementioned reanalysis, we will see
that an acceleration and shift of the EUC, attributable to the
interhemispheric gradient in surface warming, leads to faster upwelling and
more vigorous mixing. Analogous to other so-called cold blobs, this is an
early and important sentinel of broader changes in the global ocean
circulation. Thus far, and for perhaps the very near future, the western
shores of the Galápagos appear to offer refuge from some of the harmful
impacts of climate change.

__________________________________________________

*Zoom login Information:*

*Topic: ATOC Colloquium*
*Time: Friday, Sept. 2 at 11am MT*

*Join Zoom Meeting*
*https://cuboulder.zoom.us/j/97845417945
<https://cuboulder.zoom.us/j/97845417945>*

*Meeting ID: 978 4541 7945 *
*Passcode: ATOC*

One tap mobile
+17193594580,,97845417945# US
+16699006833,,97845417945# US (San Jose)

Dial by your location
        +1 719 359 4580 US
        +1 669 900 6833 US (San Jose)
        +1 253 215 8782 US (Tacoma)
        +1 346 248 7799 US (Houston)
        +1 669 444 9171 US
        +1 646 558 8656 US (New York)
        +1 646 931 3860 US
        +1 301 715 8592 US (Washington DC)
        +1 309 205 3325 US
        +1 312 626 6799 US (Chicago)
        +1 386 347 5053 US
        +1 564 217 2000 US
Meeting ID: 978 4541 7945
Find your local number: https://cuboulder.zoom.us/u/acegj8GnMV

Join by SIP
97845417945 at zoomcrc.com

Join by H.323
162.255.37.11 (US West)
162.255.36.11 (US East)
115.114.131.7 (India Mumbai)
115.114.115.7 (India Hyderabad)
213.19.144.110 (Amsterdam Netherlands)
213.244.140.110 (Germany)
103.122.166.55 (Australia Sydney)
103.122.167.55 (Australia Melbourne)
149.137.40.110 (Singapore)
64.211.144.160 (Brazil)
149.137.68.253 (Mexico)
69.174.57.160 (Canada Toronto)
65.39.152.160 (Canada Vancouver)
207.226.132.110 (Japan Tokyo)
149.137.24.110 (Japan Osaka)
Meeting ID: 978 4541 7945
Passcode: 432312

_______________________________________________________

*Andrew C. Winters*
Assistant Professor
Department of Atmospheric and Oceanic Sciences (ATOC)
University of Colorado Boulder
311 UCB, Boulder, CO 80309-0311
Office: SEEC C277 || Phone: 303-735-5775
https://acwinters.weebly.com || @acwinters_wx || he/him/his

*CU Boulder acknowledges that it is located on the traditional territories
and ancestral homelands of the Cheyenne, Arapaho, Ute and many other Native
American nations. Their forced removal from these territories has caused
devastating and lasting impacts. Full CU Boulder land acknowledgment
<https://www.colorado.edu/about/land-acknowledgement> *

------------------------------
*From:* Andrew Winters
*Sent:* Friday, August 26, 2022 10:07 AM
*To:* atoc-faculty (Alexandra Jahn) <atoc-faculty at lists.colorado.edu>;
atoc-students (Julie Lundquist) <atoc-students at lists.colorado.edu>;
atoc-researchers (Kelly Duong) <atoc-researchers at lists.colorado.edu>;
Atoc-majors at lists.colorado.edu <atoc-majors at lists.colorado.edu>;
Atoc-minors at lists.colorado.edu <atoc-minors at lists.colorado.edu>;
atoc-colloquium at lists.colorado.edu <atoc-colloquium at lists.colorado.edu>
*Subject:* ATOC Colloquium – Prof. Kris Karnauskas (ATOC) – Friday, Sept. 2
at 11am (SEEC S228 and Zoom)

Hi everyone,

Welcome back to a new semester! The first ATOC Colloquium of the fall will
be held in a hybrid format on *Friday, September 2 from 11a–12p MT over
Zoom and in SEEC S228. *This week's colloquium will feature a seminar from
ATOC professor *Kris Karnauskas* entitled, *"Upwelling and Equatorial
Islands: Old Theories and the Ocean Data Revolution*". The zoom login
information and abstract for the colloquium are provided below. Please join
us for coffee and conversation beginning at 10:45am MT, and stay afterwards
for a lunch catered by Illegal Pete's.
Please let us know if you have any questions or are interested in
delivering a talk at a future colloquium. A full schedule of ATOC colloquia
can be found at https://www.colorado.edu/atoc/colloquium. Please note that
we are still looking for two graduate students who would like to present a
short 15-minute summary of their research on November 11.

We look forward to seeing you on Sept. 2!

-The ATOC Colloquium Committee

_________________________________________________


*Upwelling and Equatorial Islands: Old Theories and the Ocean Data
Revolution *
Kris Karnauskas (ATOC)

Wind-driven upwelling is the stuff of 20th century legends from Ekman to
Wyrtki. Along the equator in the open ocean, easterly trade winds peel the
surface away and cold, nutrient-rich water rises from depth. Islands, on
the other hand, are flies in the ointment. Hotspots of marine productivity
and biodiversity near equatorial island chains, fueled by upwelling
velocities an order of magnitude greater than in the open ocean, challenge
the textbook theories. Our nascent understanding of equatorial islands and
their relationship with the ocean circulation delays our ability to predict
(and protect) crucial tropical marine ecosystems. First, we will use the
global Argo array of profiling floats to reveal the spatial scales and
provenance of upwelling at two distinct equatorial island chains (Galápagos
and Gilberts). Argo measurements resolve a clear subsurface thermal
fingerprint of vertical divergence at the depth of the Equatorial
Undercurrent (EUC), confined to within 100 km of both island chains. This
signal at the Galápagos is well reproduced by a high-resolution ocean
reanalysis, enabling estimation of vertical velocities balancing the
convergence of the EUC upon the islands. Next, we will investigate the
curious observation that the waters off the Galápagos have been cooling
over the satellite era. Using the aforementioned reanalysis, we will see
that an acceleration and shift of the EUC, attributable to the
interhemispheric gradient in surface warming, leads to faster upwelling and
more vigorous mixing. Analogous to other so-called cold blobs, this is an
early and important sentinel of broader changes in the global ocean
circulation. Thus far, and for perhaps the very near future, the western
shores of the Galápagos appear to offer refuge from some of the harmful
impacts of climate change.

__________________________________________________

*Zoom login Information:*

*Topic: ATOC Colloquium*
*Time: Friday, Sept. 2 at 11am MT*

*Join Zoom Meeting*
*https://cuboulder.zoom.us/j/97845417945
<https://cuboulder.zoom.us/j/97845417945>*

*Meeting ID: 978 4541 7945 *
*Passcode: ATOC*

One tap mobile
+17193594580,,97845417945# US
+16699006833,,97845417945# US (San Jose)

Dial by your location
        +1 719 359 4580 US
        +1 669 900 6833 US (San Jose)
        +1 253 215 8782 US (Tacoma)
        +1 346 248 7799 US (Houston)
        +1 669 444 9171 US
        +1 646 558 8656 US (New York)
        +1 646 931 3860 US
        +1 301 715 8592 US (Washington DC)
        +1 309 205 3325 US
        +1 312 626 6799 US (Chicago)
        +1 386 347 5053 US
        +1 564 217 2000 US
Meeting ID: 978 4541 7945
Find your local number: https://cuboulder.zoom.us/u/acegj8GnMV

Join by SIP
97845417945 at zoomcrc.com

Join by H.323
162.255.37.11 (US West)
162.255.36.11 (US East)
115.114.131.7 (India Mumbai)
115.114.115.7 (India Hyderabad)
213.19.144.110 (Amsterdam Netherlands)
213.244.140.110 (Germany)
103.122.166.55 (Australia Sydney)
103.122.167.55 (Australia Melbourne)
149.137.40.110 (Singapore)
64.211.144.160 (Brazil)
149.137.68.253 (Mexico)
69.174.57.160 (Canada Toronto)
65.39.152.160 (Canada Vancouver)
207.226.132.110 (Japan Tokyo)
149.137.24.110 (Japan Osaka)
Meeting ID: 978 4541 7945
Passcode: 432312


_______________________________________________________

*Andrew C. Winters*
Assistant Professor
Department of Atmospheric and Oceanic Sciences (ATOC)
University of Colorado Boulder
311 UCB, Boulder, CO 80309-0311
Office: SEEC C277 || Phone: 303-735-5775
https://acwinters.weebly.com || @acwinters_wx || he/him/his

CU Boulder acknowledges that it is located on the traditional territories
and ancestral homelands of the Cheyenne, Arapaho, Ute and many other Native
American nations. Their forced removal from these territories has caused
devastating and lasting impacts. Full CU Boulder land acknowledgment
<https://www.colorado.edu/about/land-acknowledgement>





-- 
Scott Briggs
(he/him)
Administrator

Advanced Study Program
Education, Engagement and Early-Career Development
National Center For Atmospheric Research
*phone: 303.497.1607*
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