| CIRES

Sun	Mon	Tue	Wed	Thu	Fri	Sat
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			ESOC Coffee Hour ESOC Coffee Hour This week is in-person, join us in the ESOC Reading Room, Ekeley S230. ESOC Coffee Hour occurs weekly from 9-10am MT on Wednesdays. For Fall 2021 we will be meeting on alternate weeks in person and on Zoom. Please email Claire Waugh (waughc@colorado.edu) for information. ESOC researchers, post-docs and graduate students gather for conversation and to discuss research. Occasional guest speakers are invited to give short presentations on topics of interest. Date Wednesday, October 6, 2021 9:00 am to 10:00 am Host ESOC contact Claire Waugh; waughc@colorado.edu 2021-10-06
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			Virtual ESOC Coffee Hour Virtual ESOC Coffee Hour This week is remote, join us on Zoom. ESOC Coffee Hour occurs weekly from 9-10am MT on Wednesdays. For Fall 2021 we will be meeting on alternate weeks in person and on Zoom. Please email Claire Waugh (waughc@colorado.edu) for information. ESOC researchers, post-docs and graduate students gather for conversation and to discuss research. Occasional guest speakers are invited to give short presentations on topics of interest. Date Wednesday, October 13, 2021 9:00 am to 10:00 am Host ESOC contact Claire Waugh; waughc@colorado.edu 2021-10-13 NSIDC Cryosphere Seminar NSIDC Cryosphere Seminar The Importance of Standards in Science and Society: a Short Introduction and Personal Perspective with Dr. Siri Jodha Singh Khalsa Data is the lifeblood of the sciences. The acquisition, processing and interpretation of data all depend on established specifications describing the systems and procedures that were used in producing, documenting and distributing that data. It can be said that technical standards underpin the entire scientificendeavor. This is becoming ever truer in the era of Big Data and Open, Transdisciplinary Science. The goal of this presentation is to highlight the importance of standards and to provide some insight into how standards are developed. I'll touch on Open Science and standards, the vital role standards play in achieving the UN's Sustainable Development Goals, and how standards help to ensure the ethical applications of Artificial Intelligence. I'll describe the standards development projects that the IEEE Geoscience and Remote Sensing Society has initiated, which involve the characterization and calibration of hyperspectral imagers, data and metadata produced by synthetic aperture radars and GNSS reflectometry, the calibration of microwave radiometers, methodologies for creating soil spectral libraries, and assessment of the impacts of radio frequency interference in protected geoscience bands. I’ll conclude with a summary of potential future projects and an invitation to participate. Bio: Siri Jodha Singh Khalsa is a Senior Scientist at the National Snow and Ice Data Center, CIRES, U.Colorado, Boulder. He has published in the fields of boundary layer turbulence, global atmospheric teleconnections, air-sea interaction, glaciology, satellite remote sensing and Earth science informatics. Since 1993 he has supported NASA’s Distributed Active Archive Center (DAAC) at NSIDC where he performs science evaluation and algorithm support for data products coming from NASA’s Earth observing satellites, as well as leading informatics and cryospheric research projects. He is the chair of the Institute of the IEEE Geoscience and Remote Sensing Society Standards Committee and its liaison to the Open Geospatial Consortium and Technical Committee 211 of the International Organization for Standardization. Profile: https://nsidc.org/research/bios/khalsa.html TO JOIN BY ZOOM: From a computer: https://cuboulder.zoom.us/j/5409618610 Or iPhone one-tap :US: +16465588656,,5409618610# Or Telephone: US: +1 646 558 8656 Meeting ID: 540 961 8610 International numbers available: https://zoom.us/u/MNl8z Date Wednesday, October 13, 2021 11:00 am to 12:00 pm MDT Link https://cuboulder.zoom.us/j/5409618610 Host NSIDC Audience CIRES employees CU Boulder employees General Public NOAA employees Science collaborators Type Seminar Open to Public Resources https://cuboulder.zoom.us/j/5409618610 contact Mistia Zuckerman 2021-10-13	NC CASC Webinar Series: "Forest impacts on snow water resources: management and climate adaptation possibilities" NC CASC Webinar Series: "Forest impacts on snow water resources: management and climate adaptation possibilities" Please join us for the NC CASC webinar on Thursday, October 14, 2021, 11a -12p MDT: "Forest impacts on snow water resources: management and climate adaptation possibilities" Presented by: Dr. Keith Musselman, Institute of Arctic and Alpine Research, University of Colorado Boulder Please register in advance for this meeting: https://cuboulder.zoom.us/meeting/register/tJIqcOutrjMpH9Hay66HQPzjystnCGcFTG4i After registering, you will receive a confirmation email containing information about how to join the meeting. Abstract: Most of the snow water resources that feed North America’s large rivers originate from forested land. Forest canopies greatly affect the snow on the ground. Forest cover intercepts snowfall that subsequently sublimates back to the atmosphere – a water resource that is never realized. At the same time, forest canopy shelters snow from wind and shades it from solar radiation, facilitating the persistent provision of meltwater late into the spring. In this talk, I present both empirical data and models to review how forest structure impacts snow and the critical consequences of climate change and forest structure degradation on the hydrology, meteorology and ecology of forests. The challenges and possibilities to inform adaptive response by forest management practitioners and the needs for robust, community-based predictive models are discussed. About the speakers: Dr. Keith Musselman is a research associate at INSTAAR. As a hydrologist, Keith assesses climate change and land cover impacts on freshwater availability, streamflow, and flood risk across a spectrum of scale. Keith holds a B.S. in Geology from the University of Vermont, an M.S. in Hydrology and Water Resources from the University of Arizona, and a Ph.D. in Civil Engineering from UCLA. As a postdoc, he worked for the University of Saskatchewan on the topics of forest hydrology and land cover change. He was a postdoctoral fellow at the National Center for Atmospheric Research (NCAR) from 2015-2017 where he helped to advance hydrologic model treatment of cold region processes. Now at the University of Colorado Boulder, Keith leads multiple large interdisciplinary research projects including a team of 20 people to assess climate change impacts on Indigenous communities in Alaska and the Yukon using co-production. Keith has authored 30 publications including recent high-profile papers on snowmelt and flood risk in current and future climates. Past NC CASC Webinar Recordings: https://nccasc.colorado.edu/webinars Dates for future NC CASC webinars: November 11, 2021, 11a-12p MST December 9, 2021, 11a-12p MST Date Thursday, October 14, 2021 11:00 am to 12:00 pm mountain Host NCCASC Audience General Public Type Other Open to Public 2021-10-14
17	18	19	20	21	22	23
			ESOC Coffee Hour ESOC Coffee Hour This week is in-person, join us in the ESOC Reading Room, Ekeley S230. ESOC Coffee Hour occurs weekly from 9-10am MT on Wednesdays. For Fall 2021 we will be meeting on alternate weeks in person and on Zoom. Please email Claire Waugh (waughc@colorado.edu) for information. ESOC researchers, post-docs and graduate students gather for conversation and to discuss research. Occasional guest speakers are invited to give short presentations on topics of interest. Date Wednesday, October 20, 2021 9:00 am to 10:00 am Host ESOC contact Claire Waugh; waughc@colorado.edu 2021-10-20
24	25	26	27	28	29	30
	Atmospheric Chemistry Program Seminar Atmospheric Chemistry Program Seminar Comparison of Common Vapor Pressure Estimation Methods through Modeling of Alkene OH·/NOx Systems Emmaline Longnecker, ANYL 1st year, CU Boulder (1/2 seminar) "Modeling of atmospheric reactions is an important tool in understanding the current and future impacts of human activity on the environment. Vapor pressure is a key parameter in modeling these reactions, as it largely determines the ability of a species to transition from the gas to particle phase. However, the vapor pressures of many atmospherically relevant molecules are still poorly constrained. In order to aid modeling efforts, several group contribution methods have been developed for estimating compound vapor pressures. The current study evaluates how four of these methods: SIMPOL, EVAPORATION, SPARC, and Nannoolal, impact the modeled predictions of secondary organic aerosol (SOA) yields for the reactions of C8-C14 1-alkenes with OH radicals in the presence of NOx. The models were created in the program KinSim and included detailed reaction mechanisms and branching ratios determined in several previous chamber studies by our research group, as well as gas-particle and gas-wall partitioning. SOA yields predicted using each of the four estimation methods were then compared to the measured values. The results of the models were variable, with the maximum discrepancies ranging from an underestimate of ~40% to an overestimate of ~30% compared to the experimentally determined mass yields. This variability exemplifies the impact of vapor pressure in modeling atmospheric reactions and indicates the need for further research in development of estimation methods." and Redox-Active Coordination Complexes for Small Molecule Activation with Environmental Applications Hanalei Lewine, ANYL 1st year, CU Boulder (1/2 seminar) "Nitrate and nitrite are harmful pollutants resulting from the overuse of nitrogen fertilizers in agriculture. In Nature, denitrification converts these to lower-oxidation state nitrogen species, each step being catalyzed by a different metalloenzyme such as nitrate reductase. Synthetic systems that mimic these enzymes could convert NOx- to less harmful, and potentially useful compounds like nitrogen (N2) and ammonia (NH3). The highly versatile pyridinediimine (PDI) ligand has been successful in the reduction of these species due to the potential for incorporating redox-activity, proton-responsivity, and hemilability into the ligand scaffold. A new PDI iron complex featuring a hemilabile pendant phosphine shows reactivity towards nitrate and nitrate to selectively reduce to NO on a mononitrosyl iron complex (MNIC) will be presented." Date Monday, October 25, 2021 12:30 pm Host CIRES CU Boulder Audience CIRES employees CU Boulder employees NOAA employees Science collaborators Type Seminar Open to Public contact anne.handschy@colorado.edu 2021-10-25	CIRES Town Hall CIRES Town Hall Please join CIRES Director Waleed Abdalati for another CIRES Town Hall on Tuesday, October 26 for both CU Boulder and NOAA-based employees. Join Zoom Meeting https://cuboulder.zoom.us/j/91405849143 Meeting ID: 914 0584 9143 One tap mobile +12532158782,,91405849143# US (Tacoma) +13462487799,,91405849143# US (Houston) Dial by your location +1 253 215 8782 US (Tacoma) +1 346 248 7799 US (Houston) +1 669 900 6833 US (San Jose) +1 301 715 8592 US (Washington DC) +1 312 626 6799 US (Chicago) +1 646 558 8656 US (New York) Meeting ID: 914 0584 9143 Find your local number: https://cuboulder.zoom.us/u/acwEefnQ0 Join by SIP 91405849143@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: 914 0584 9143 Date Tuesday, October 26, 2021 9:00 am to 10:00 am Host CIRES Audience CIRES employees NOAA employees Type Other 2021-10-26	Virtual ESOC Coffee Hour Virtual ESOC Coffee Hour This week is remote, join us on Zoom. ESOC Coffee Hour occurs weekly from 9-10am MT on Wednesdays. For Fall 2021 we will be meeting on alternate weeks in person and on Zoom. Please email Claire Waugh (waughc@colorado.edu) for information. ESOC researchers, post-docs and graduate students gather for conversation and to discuss research. Occasional guest speakers are invited to give short presentations on topics of interest. Date Wednesday, October 27, 2021 9:00 am to 10:00 am Host ESOC contact Claire Waugh; waughc@colorado.edu 2021-10-27
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NSIDC Cryosphere Seminar

The Importance of Standards in Science and Society: a Short Introduction and Personal Perspective with Dr. Siri Jodha Singh Khalsa

Data is the lifeblood of the sciences. The acquisition, processing and interpretation of data all depend on established specifications describing the systems and procedures that were used in producing, documenting and distributing that data. It can be said that technical standards underpin the entire scientificendeavor. This is becoming ever truer in the era of Big Data and Open, Transdisciplinary Science. The goal of this presentation is to highlight the importance of standards and to provide some insight into how standards are developed. I'll touch on Open Science and standards, the vital role standards play in achieving the UN's Sustainable Development Goals, and how standards help to ensure the ethical applications of Artificial Intelligence. I'll describe the standards development projects that the IEEE Geoscience and Remote Sensing Society has initiated, which involve the characterization and calibration of hyperspectral imagers, data and metadata produced by synthetic aperture radars and GNSS reflectometry, the calibration of microwave radiometers, methodologies for creating soil spectral libraries, and assessment of the impacts of radio frequency interference in protected geoscience bands. I’ll conclude with a summary of potential future projects and an invitation to participate.

Bio: Siri Jodha Singh Khalsa is a Senior Scientist at the National Snow and Ice Data Center, CIRES, U.Colorado, Boulder. He has published in the fields of boundary layer turbulence, global atmospheric teleconnections, air-sea interaction, glaciology, satellite remote sensing and Earth science informatics. Since 1993 he has supported NASA’s Distributed Active Archive Center (DAAC) at NSIDC where he performs science evaluation and algorithm support for data products coming from NASA’s Earth observing satellites, as well as leading informatics and cryospheric research projects. He is the chair of the Institute of the IEEE Geoscience and Remote Sensing Society Standards Committee and its liaison to the Open Geospatial Consortium and Technical Committee 211 of the International Organization for Standardization.

Profile: https://nsidc.org/research/bios/khalsa.html

TO JOIN BY ZOOM:

From a computer: https://cuboulder.zoom.us/j/5409618610

Or iPhone one-tap :US: +16465588656,,5409618610#

Or Telephone: US: +1 646 558 8656

Meeting ID: 540 961 8610

International numbers available: https://zoom.us/u/MNl8z

Date

Wednesday, October 13, 2021

11:00 am to 12:00 pm

MDT

Link

https://cuboulder.zoom.us/j/5409618610

Host

NSIDC

Audience

CIRES employees
CU Boulder employees
General Public
NOAA employees
Science collaborators

Type

Seminar

Open to Public

Resources

https://cuboulder.zoom.us/j/5409618610

contact

Mistia Zuckerman

2021-10-13

NC CASC Webinar Series: "Forest impacts on snow water resources: management and climate adaptation possibilities"

Please join us for the NC CASC webinar on Thursday, October 14, 2021, 11a -12p MDT: "Forest impacts on snow water resources: management and climate adaptation possibilities"

Presented by: Dr. Keith Musselman, Institute of Arctic and Alpine Research, University of Colorado Boulder

Please register in advance for this meeting: https://cuboulder.zoom.us/meeting/register/tJIqcOutrjMpH9Hay66HQPzjystnCGcFTG4i

After registering, you will receive a confirmation email containing information about how to join the meeting.

Abstract:

Most of the snow water resources that feed North America’s large rivers originate from forested land. Forest canopies greatly affect the snow on the ground. Forest cover intercepts snowfall that subsequently sublimates back to the atmosphere – a water resource that is never realized. At the same time, forest canopy shelters snow from wind and shades it from solar radiation, facilitating the persistent provision of meltwater late into the spring. In this talk, I present both empirical data and models to review how forest structure impacts snow and the critical consequences of climate change and forest structure degradation on the hydrology, meteorology and ecology of forests. The challenges and possibilities to inform adaptive response by forest management practitioners and the needs for robust, community-based predictive models are discussed.

About the speakers:

Dr. Keith Musselman is a research associate at INSTAAR. As a hydrologist, Keith assesses climate change and land cover impacts on freshwater availability, streamflow, and flood risk across a spectrum of scale. Keith holds a B.S. in Geology from the University of Vermont, an M.S. in Hydrology and Water Resources from the University of Arizona, and a Ph.D. in Civil Engineering from UCLA. As a postdoc, he worked for the University of Saskatchewan on the topics of forest hydrology and land cover change. He was a postdoctoral fellow at the National Center for Atmospheric Research (NCAR) from 2015-2017 where he helped to advance hydrologic model treatment of cold region processes. Now at the University of Colorado Boulder, Keith leads multiple large interdisciplinary research projects including a team of 20 people to assess climate change impacts on Indigenous communities in Alaska and the Yukon using co-production. Keith has authored 30 publications including recent high-profile papers on snowmelt and flood risk in current and future climates.

Past NC CASC Webinar Recordings: https://nccasc.colorado.edu/webinars

Dates for future NC CASC webinars:

November 11, 2021, 11a-12p MST

December 9, 2021, 11a-12p MST

2021-10-14

ESOC Coffee Hour

Atmospheric Chemistry Program Seminar

Comparison of Common Vapor Pressure Estimation Methods through Modeling of Alkene OH·/NOx Systems

Emmaline Longnecker, ANYL 1st year, CU Boulder (1/2 seminar)

"Modeling of atmospheric reactions is an important tool in understanding the current and future impacts of human activity on the environment. Vapor pressure is a key parameter in modeling these reactions, as it largely determines the ability of a species to transition from the gas to particle phase. However, the vapor pressures of many atmospherically relevant molecules are still poorly constrained. In order to aid modeling efforts, several group contribution methods have been developed for estimating compound vapor pressures. The current study evaluates how four of these methods: SIMPOL, EVAPORATION, SPARC, and Nannoolal, impact the modeled predictions of secondary organic aerosol (SOA) yields for the reactions of C8-C14 1-alkenes with OH radicals in the presence of NOx. The models were created in the program KinSim and included detailed reaction mechanisms and branching ratios determined in several previous chamber studies by our research group, as well as gas-particle and gas-wall partitioning. SOA yields predicted using each of the four estimation methods were then compared to the measured values. The results of the models were variable, with the maximum discrepancies ranging from an underestimate of ~40% to an overestimate of ~30% compared to the experimentally determined mass yields. This variability exemplifies the impact of vapor pressure in modeling atmospheric reactions and indicates the need for further research in development of estimation methods."

and

Redox-Active Coordination Complexes for Small Molecule Activation with Environmental Applications

Hanalei Lewine, ANYL 1st year, CU Boulder (1/2 seminar)

"Nitrate and nitrite are harmful pollutants resulting from the overuse of nitrogen fertilizers in agriculture. In Nature, denitrification converts these to lower-oxidation state nitrogen species, each step being catalyzed by a different metalloenzyme such as nitrate reductase. Synthetic systems that mimic these enzymes could convert NOx- to less harmful, and potentially useful compounds like nitrogen (N2) and ammonia (NH3). The highly versatile pyridinediimine (PDI) ligand has been successful in the reduction of these species due to the potential for incorporating redox-activity, proton-responsivity, and hemilability into the ligand scaffold. A new PDI iron complex featuring a hemilabile pendant phosphine shows reactivity towards nitrate and nitrate to selectively reduce to NO on a mononitrosyl iron complex (MNIC) will be presented."

Date

Monday, October 25, 2021

12:30 pm

Host

CIRES
CU Boulder

Audience

CIRES employees
CU Boulder employees
NOAA employees
Science collaborators

Type

Seminar

Open to Public

contact

anne.handschy@colorado.edu

2021-10-25

CIRES Town Hall

Virtual ESOC Coffee Hour