katedennis's blog

katedennis's blog

When water vapor isotope observations meet an old schooner

The schooner, Activ, an ice-class cargo vessel turned research vessel.

by Hans Christian Steen-Larsen (hanschr at gfy.ku.dk), Anne-Katrine Faber, and Malte Winther, Centre for Ice and Climate, University of Copenhagen

A trip on the Sacramento-San Joaquin River Delta with USGS

On the Delta with USGS

By David Kim-Hak, Product Manager

Delta Cruise Part I

Leading the way in ammonia measurement technologies for compliance with regulated emissions ceilings


Across the globe ammonia emissions are on the rise.  Emissions inventories, and limited networks of ambient air measurements, suggest the rise is predominantly due to intensive farming practices and the increased use of nitrogen-based fertilizers.

Visiting the IAEA for a field demonstration of soil flux measurements for fertilizer optimization

By Renato Winkler, Picarro Application Scientist -- Some weeks ago, I was invited to join and assist an International Atomic Energy Agency Regional Training Course on nitrogen management.

Using stable isotopes of water for water use efficiency in agriculture

Participants in the IAEA/ICBA Regional Training Course in Dubai, UAE, Nov 2-6, 2014

I just returned from a week-long trip to Dubai where I was fortunate to participate in and help lead an International Atomic Energy Agency Regional Training Course on “Separating evapotranspiration (ET) into evaporation (E) and transpiration (T) using isotopic and conventional techniques”.  The five day technical course gathered about 15 scientists from across the Middle East region to learn about the importance of understand water use efficiency in agriculture, and in particular how to use stable isotopes of water to partition water loss from crops into “good” water loss (transpiratio

Crowd-sourced isotope study of Superstorm Sandy

Samples arriving, the post office folks were quite busy for a while

By Guest Bloggers Stephen Good and Gabe Bowen

Well, we’re approaching the two-year anniversary of Hurricane Sandy, and we figured it would be a good time to reminisce about that intensive sample storm that swirled through our Utah lab after the floodwaters of Sandy subsided in New Jersey …

Goldschmidt 2014 and ASITA keep us busy for the month of June!

Picarro booth at Goldschmidt 2014

In early June we made the short trip from Picarro’s Headquarters in Silicon Valley to Sacramento and Davis for Goldschmidt 2014 and ASITA.  Although pretty different conferences, we had a great time at both and had some excellent conversations with globally-recognized isotope geochemists, newcomers to the field, avid Picarro users and those just getting into the game.  

USGS/CUAHSI Virtual Workshop on Laser Spectroscopy

The Consortium of Universities for the Advancement of Hydrologic Science, Inc. (CUAHSI), in partnership with USGS, recently hosted a Virtual Workshop on Laser Specs for Field Hydrology and Biogeochemistry: Lessons Learned and Future Prospects. I was invited to present on Picarro and Cavity Ring Down Spectroscopy as applied to hydrology and biogeosciences, and you can watch the webinar here:

A trip to Paris is never a bad thing...


A trip to Paris is never a bad thing, especially when the excuse is a gathering of about 50 of the top atmospheric scientists from around the world who are using water vapor isotopes. Last week, scientists from Laboratoire des Sciences du Climat et l'Environnement (LSCE) hosted an intimate workshop on “Advances In Observations, Models And Measurement Techniques Of Atmospheric Water Vapor Isotopes” at the Centre National de la Recherche Scientifique (CNRS) in Gif-sur-Yvette.