RA5 – Workshop in Stockholm on Stable water isotopes and climate, October 2014

Location: Geoscience building, Stockholm 
20–22 October 2014
Contact: Rienk Smittenberg, This email address is being protected from spambots. You need JavaScript enabled to view it.

Understanding the processes behind isotope signals in paleoclimate archives, together with modern satellite measurements and atmospheric modelling

Various stable water isotopic (D/H and δ18O) signals from natural archives are widely used to reconstruct the
past (hydrologic) climate. Today we also have satellite measured and atmospheric modelled stable isotope data,
which enables us to better understand the physical processes behind the isotopic signals. There are strong
research interests among Bolin centre scientists on these activities. This workshop aims to exchanges ideas and
establish collaboration between Bolin Centre and other international research groups. The workshop includes
presentations from guest speakers and Bolin scientists, as well as scientific question oriented discussions. We will
address the following questions:
1. What is the best way to compare and use the various water isotope proxies and records?
2. What regions and time frames deserve special attention?
3. What are the main factors that controls tropical and extratropical water isotope dynamics? Do the subtropics have a problem?
4. How comparable are and δ18O and δD records from various types of carriers (ice, lipids, forms, trees, speleothems) as well as from satellite measurements and atmospheric modelling?
5. What are the particular strengths and weakness of the various proxies? Where lie the main errors and uncertainties?
6. Can we come to a smart way of reconstructing d-excess?

Agenda

October 20, 2014, Monday
Högbom Hall, Geoscience building, Stockholm
9.00–9.19
 
Welcome
9.15–9.45
 
NEEM ice core from the water stable isotope fingerprint of summer 2012 atmospheric river event

Valérie Masson-Delmotte, LSCE, France

9.45–10.15
 
Satellite observation of water vapour isotopologues in the atmosphere

Stefan Lossow, IMK, Germany

10.15–10.45
 
Eliminating kinetic effects in isotope time series – an example from Siberian stalagmites

Sebastian Breitenbach, ETH Zurich

10.45–11.15
 
Coffee break
11.15–11.45
 
Reconstructing ocean circulation changes using carbon isotopes – from proxies, modern ocean data, and models

Ulysses S. Ninnemann, Bjerknes Center for Climate Research

11.45–12.15
 
D/H of alkenones as proxy for paleo sea surface salinity
Marcel van der Meer, Netherlands Institute of Sea Research
12.30−13.30
 
Lunch

Note! The workshop will continue in Room Y23

14.00−14.15
 
Climate variability signals in speleothem isotope

Karin Holmgren, INK, Stockholm

14.15−14.30
 
Stable water isotopes in stratosphere retrieved from Odin satellite

Qiong Zhang, INK, Stockholm

14.30−14.45
 
Using climate models to interpret the signals in proxy: 2 case-studies

Francesco Pausata, MISU, Stockholm

14.45−15.00
 
Forward δ18O-proxy modelling: on non-linearities in the point-to-gridcell gap

Christope Sturm, IGV, Stockholm

15.00−17.00
 
Discussion on question 1−3, with a coffee break in between
     
October 21, 2014, Tuesday
Ahlmann Hall, Geoscience building, Stockholm
9.30–10.00
 
Mechanistic models of tree growth to resolve apparent contradictions in reconstructions

Johannes Werner, University of Bergen 

10.00–10.30
 
Towards isotope-enabled model evaluation using tree-ring proxies

Neil Loader, Swansea University, UK

10.30–11.00
 
Coffee break
11.00–11.30
 
From plants to pediments: hydrogen isotope systematics of leaf waxes in a temperate saltmarsh

Yvette Eley, University of East Anglia

11.30–12.00
 
Towards a mechanistic understanding of the environmental and plant physiological controls on leaf
wax δD values and it’s significance for quantitative paleohydrology

Dirk Sachse, University of Potsdam

12.00–12.30
 
Seasonal shifts in moisture sources and influence of recycled continental moisture

Jesper Sjolte, Lund University

12.30–14.00
 
Lunch

Note! The workshop will continue in Room Y23

14.00−14.15
 
Lake water isotope systematics in northern Sweden

Gunhild Rosqvist, INK, Stockholm

14.15−14.30
 
Comparison of a Holocene leaf wax D/H record with other proxy data

Elin Norström, IGV, Stockholm

14.30−14.45
 
Leaf wax and diatom-based D/H ratios as a tool to infer climate change during the last deglaciation

Francesco Muschitiello, IGV, Stockholm

14.45−15.00
 
A 2000 year leaf wax D/H – based paleohydrologic record from Thailand based on leaf wax D/H, and connections to other paleohydrological records

Kweku Yamoah, IGV, Stockholm

15.00−17.00
 
Discussion on question 4–6, with a coffee break in between
18.30
 
Dinner
     
October 22, 2014, Wednesday
Room Y23
9.30–12.00
 
Final discussion, summary and conclusion of the workshop, highlights of workshop outcome and future collaboration
Afternoon
 
Individual discussions
     
     
Download the program
Bolin Centre for Climate Research
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