Workshop «Water Isotopes: From Weather to Climate»: Summary

Summary of hybrid workshop «Water isotopes: From Weather to Climate»

Time: 15-17 November 2021
Format: Distributed hybrid workshop with national hubs and individual zoom participation
Organizing Committee:
Harald Sodemann, University of Bergen, Norway
Franziska Aemisegger, ETH Zürich, Switzerland
Camille Risi, LMD/CNRS, France

Stable water isotopes offer unique insight into a wide variety of Earth System processes, including the atmospheric, terrestrial, glacial and oceanic components. While many processes that affect the water isotopes take place on the time scale of weather events and below, their cumulative effect imprints on the climatic record in observations and proxy archives. The principal idea of this workshop was to provide opportunities for the community to develop a common understanding on how water isotope processes work and how they influence the climate signal, through studies involving  observations, laboratory work, theory, modelling, and model-data integration.

We invited submission of abstracts to one of the following 3 sessions:

    • Water isotope observations on weather time scales
    • Water isotope modelling and model-data integration
    • Water isotopes from weather to climate time scales

Workshop results

During the workshop, discussion sessions were conducted with the following topics:

    • Stable water isotope observation and model inter-comparisons
    • Data sharing and formats for models and observations
    • Communicating about water isotopes with non-specialists
    • Going from weather to climate with isotopes: how to close the gap?

A final report from this workshop, including a summary of the discussion sessions, will be published here in the coming weeks.


The 3-day event was organised as a distributed hybrid workshop, centered on 4 local hubs, in Bergen, Norway; Zürich, Switzerland; Bremen,Germany, and Tokyo, Japan. Participants either joined one of the local hubs in person, or participated in the workshop online as individuals via zoom. Poster sessions were conducted using the online platform With overall 160 registered participants across many time zones, and on average 70-90 active participants during each of the 3 half-day sessions, there was substantial active participation throughout the workshop.

Motivation and organisation

The workshop continued from the last major international workshop in water isotope science, «Water Isotopes and Climate» in Boulder, Colorado in 2019, organised by US CLIVAR. In the recently published workshop report from that meeting, several important topics are outlined that are valuable for the water isotope community to discuss, pursue, and develop further. In addition, the pandemic has made it very difficult for young scientists to build their professional networks in a regular way, due to the lack of visiting opportunities and personal conference participation. We therefore organised this workshop in a hybrid format with national/local hubs that enabled some degree of personal interaction if current respective national regulations allow. For all participants, but in particular those that are not able to join one of the local hubs, we contributed to increased feedback and exchange to talks and posters by assigned commenters. Poster sessions were conducted as digital sessions using

List of participants

The list of participants, including email addresses in a non-machine readable format is available here:  Stable_Isotopes_Workshop_2021_Participants_List

Mailing list

We have created a mailing list that allows sending announcements about open positions, informing about new publications, new data, or fieldwork or asking general questions. Sign up to the mailing list on the waterisotopes mailing list home page.

Final detailed programme

The programme contains links to the abstracts, video recordings, and PDFs if available. You can watch entire sessions by following the youtube link to the individual oral sessions.

Oral Session 1: Monday, 15 Nov 2021 (Youtube link)

Harald Sodemann: Welcome address [Video]
Hans Christian Steen-Larsen: A decade of continuous water vapor isotope measurements on time scales from seconds to years and on local to regional scales [Abstract] [Video]
Moen Mellat: Isotopic traits of the Arctic water cycle [Abstract] [Video][PDF]
Andrew Seidl: High-resolution near-surface profiles of stable water isotopes over snow-covered tundra and fjord water [Abstract] [Video]
Alena Dekhtyareva: Cloud microphysical processes and stable water isotopes during ISLAS 2020 campaign in Svalbard [Abstract] [Video]
Di Wang: 3D distribution of atmospheric vapor isotopesprofiles in monsoon season in China, with afocus on tropospheric [Abstract][No video]
Matthias Schneider: The global multi-anual MUSICA IASI {H2O,delD} data product and satellite data perspectives in Europe [Abstract] [Video]
Iris Thurnherr: The value of spatial representativeness for comparing satellite-retrieved and in-situ δD measurements to isotope-enabled model simulations [Abstract] [Video]
Poster Session 1 
Georgy Falster: Inferring global-scale spatio-temporal δ18OP patterns from local datasets [Abstract] [Poster]
Thomas Chen: Deep Learning for Estimating High Temporal Resolutions of Stable Water Isotope Concentrations [Abstract]
Georgia Murray: Long-term mountain precipitation and stream water isotopes from New Hampshire wilderness; initial results  [Abstract] [Poster]
Harald Sodemann: Density of recent isotope observations in the European storm track region [Abstract] [Poster]
Rósa Ólafsdóttir: Water stable isotopes in daily precipitation in Reykjavík during 2016-2021: Link to climate parameters and the isotope-enabled ECHAM5-wiso climate model [Abstract] [Poster]
Stéphane Affolter: Water stable isotope signature of precipitation from Switzerland related to moisture sources [Abstract] [Poster]
Stefan Terzer-Wassmuth: The stable isotopic complexity of thunderstorm precipitation – First results of the IAEA HiRise21 experiment [Abstract] [Poster]
Alexandra Touzeau: In-situ vapor isotope measurement in the Arctic seas (Summer 2018): links to moisture origin at synoptic time scales? [Abstract] [Poster]
Mika Lanzky: Investigation of the preservation of the water isotopic moisture source signal in atmospheric vapour, snowfall and snow pack at Finse, Norway during winter season 2018-2019 [Abstract] [Poster]
Pål Tore Mørkved: Analytical procedures for water isotope analysis at FARLAB  [Abstract] [Poster]
Adriana Bailey: Measuring cloud isotope ratios behind a Counterflow Virtual Impactor [Abstract] [Poster]
Andreas Schneider: Retrieving H2O/HDO columns over cloudy and clear-sky scenes from the Tropospheric Monitoring Instrument (TROPOMI) [Abstract] [Poster]
Camilla Francesca Brunello: Atmospheric water vapour isotopes in the Arctic at the interface with sea ice and open ocean [Abstract] [Poster]

Oral Session 2: Tuesday, 16 Nov 2021 (Youtube link)

Camille Risi: Recap of Day 1, Introduction to Day 2 [No video][PDF]
Kei Yoshimura: Advances in water isotope observation, simulation, and model-data integration [Abstract] [Video]
Jun Hu: Examination of the influence of shallow convective mixing on low-level clouds with observations of stable water isotopes [Abstract] [Video]
Supriyo Chakraborty: Estimation of monsoon withdrawal date in southern India using the isotopic technique [Abstract] [Video]
Fabienne Dahinden: Synoptic variability of specific humidity and isotope composition over the subtropical North Atlantic: a numerical modelling study [Abstract] [Video][PDF]
Andries de Vries: Stable water isotope signals in tropical ice clouds in the West African monsoon simulated with a regional convection-permitting model [Abstract] [Video][PDF]
David Noone: When microphysics matters for rain and clouds [Abstract] [Video]
Poster session 2
Sidan Lyu: Variability in δ2H and δ18O of Soil Water and Its Linkage to Precipitation in An East Asian Monsoon Subtropical Forest Plantation[Abstract]Poster
Camille Risi: Iact of convective organization on tropospheric humidity and isotopic composition [Abstract] [Poster]
Yan Yang: Isotopic signals in precipitation and water vapor during the Hurricanes Irma and Maria [Abstract] [Poster]
Leonie Villiger: Observations and Simulations of the Stable Water Isotope Signature of Convective Updrafts and Downdrafts Associated with Different Mesoscale Organization Patterns of Shallow Trade Wind Clouds [Abstract] [Poster]
Dean Henze: Detecting precipitation vs. mixing in shallow cloud marine boundary layers [Abstract] [Poster]
Estefania Quinones Melendez: Isotopic signals in marine atmospheric cold pools [Abstract] [Poster]
Stebastian Los: Probing the Trade-Regime Water Cycle: Comparing Isotopes, Soundings, and Surface-Based Remote Sensing Aboard the RV Meteor during EUREC4A [Abstract] [Poster]
Giuseppe Torri: The isotopic composition of rainfall on a subtropical mountainous island [Abstract] [Poster]
Yafei Li: The role of dew and radiation fog inputs in the local water cycling of a temperate grassland during dry spells in central Europe [Abstract] [Poster]
Farahnaz Khosrawi: Can the assimilation of IASI water isotopolologue observations improve the quality of tropical diabatic heating? [Abstract] [Poster]
Xuejie Wang: MJO/BSISO and Stable isotope variation of precipitation in southern Asia [Abstract] [Poster]
Hayoung Bong: Inter-comparison of water isotope-enabled models and reanalysis nudging effects: step forward in SWING project [Abstract] [Poster]
Mojtaba Heydarizad: Are empirical equations able to calculate stable isotopes content of vapor correctly? [Abstract] Poster]

Oral Session 3: Wednesday, 17 Nov 2021 (Youtube link)

Franziska Aemisegger: Recap of Day 2 and Intro to Day 3 [No Video][PDF]
Sylvia Dee: Water Isotope Enabled Modeling: recent progress and next steps [Abstract] [Video]
Marina Dütsch: A new theoretical framework for parameterizing nonequilibrium fractionation during evaporation from the ocean [Abstract] [Video][PDF]
Xiaoxu Shi: Preliminary results of an isotope-enabled earth system model AWIESM-wiso [Abstract] [Video]
Alexandre Cauquoin: Transient simulation of the past 2000 years with the isotope-enabled coupled model MPI-ESM-wiso [Abstract] [Video]
Atsushi Okazaki: Development of MIROC5-iso and its comparison with isotopic climate proxies [Abstract] [Video]
Kanon Kino: Contribution of the Southern Annular Mode to variations in water isotopes of daily precipitation at Dome Fuji, East Antarctica: A study with an isotope-enabled AGCM MIROC5-iso [Abstract] [Video]
Christophe Leroy-Dos Santos: From atmospheric water isotopes measurement to snow core interpretation in Adelie Land: A case study for GCMs with embedded isotopes in Antarctica [Abstract] [Video]
Sarah Worden: Quantifying ET Over the Congo Basin Using a Combination of Remotely-sensed and Surface Measurements [Abstract] [Video]

Camille Risi: A Summary and recap of day 3 of the workshop [Page].

Poster session 3
Jun Hu & Yuzhen Yan: Sublimation origin of negative deuterium excess observed in snow and ice samples from McMurdo Dry Valleys and Allan Hills Blue Ice Areas, East Antarctica [Abstract] [Poster]
Mathieu Casado: Water vapor isotopic signature along the EAIIST traverse (East Antarctica Plateau) [Abstract] [Poster]
Sonja Wahl: Isotope Signal Formation in Snow – Insights from the Greenland Ice Sheet [Abstract]
Alison McLaren: The Introduction of Stable Water Isotopes to the UK Earth System Model (UKESM2) [Abstract] [Poster]
Merve Gorguner: Stable Water Isotope Incorporation in the Joint UK Land Environment Simulator (JULES) Model [Abstract] [Poster]
Kyle Heyblom: A fully coupled isotope-enabled Earth system model ensemble dataset under historical and future forcing [Abstract] [Poster]
Chengfei He: Abrupt Heinrich Stadial 1 cooling missing in Greenland oxygen isotopes [Abstract] [Poster]
Satoru Shoji: Data assimilation using oxygen isotope ratios of proxies aimed at the last millennium climate reconstruction [Abstract] [Poster]
Daniele Zannoni: Kinetic fractionation factors for ocean evaporation: limited impact of wind speed observed [Abstract] [Poster]
Saeid Bagheri Dastgerdi: Continuous monitoring of surface water vapour isotopic compositions at Neumayer Station III, East Antarctica [Abstract] [Poster]
Naoyuki Kurita: Introduction of the new isotope-enabled global water transport model [Abstract] [Poster]
Masahiro Tanoue: Modelling the water isotopes with a global cloud-system-resolving model: Evaluation against site observation and gridded dataset [Abstract] [Poster]

This workshop was supported by funding from the Norwegian Research Council through the project SNOWPACE, and the European Commission by ERC Consolidator Grant project ISLAS.



Last update: 22 January 2022