letter sent to quaternary geologists in 17 countries
Subject: Dating Database and GIS-based Reconstruction for Eurasian
In the British-Dutch-Norwegian co-operative project “Impact of changing
freshwater flows on the thermohaline circulation and European climate –
analysis and modelling of the last deglaciation” led by Sandy Harrison,
Bristol, we have promised to produce maps of the deglaciation
chronology of the Eurasian ice sheets (i.e. including the Barents-Kara
sea, Scandinavian and British ice sheets).
This is a letter of information, an invitation for
collaboration, and a request for help with this huge task. Simply reply
to this e-mail (to: firstname.lastname@example.org) if you want to
know more. Please distribute this letter to all interested research
We have decided to subdivide it in two tasks:
1) a DATabase on Eurasian Deglaciation Dates (DATED – 1)
2) a Digital ATlas of the Eurasian Deglaciation (DATED - 2).
In (DATED - 2) we aim to build a GIS (geographical
information system) on the deglaciation pattern of the European ice
margin, based on existing literature on mapped ice marginal deposits
and with interpreted ice margin reconstructions (isochrones) for
certain time-slices (1 ka interval?) on a calendar year time scale from
ca 25 ka to ca 9 ka.
Along with the GIS, we will create a database (DATED – 1) on available
dates (14C, exposure, OSL) relevant for the deglaciation chronology (~
25 ka to ~ 9 ka), with full reference and credit to original authors.
Our intention is that both the GIS and
chronology-database shall be available on the WEB to the scientific
community and successively updated. The purpose is to provide accurate
digital maps of the deglaciation pattern to modellers and other
researchers, and to facilitate future recalibrations of dates and
re-interpretation of the deglaciation pattern. Full references to all
authors of the data used will be stored in the GIS, along with all
original data sources (scanned maps, dating and calibration info etc),
available for successive quality control and re-interpretation.
This giant task obviously requires collaboration
with other researchers (such as you) in this field. We would therefore
like to know if any similar projects are planned or ongoing elsewhere,
in order to eliminate “double work”. We would also like to know about
existing compilations or databases on dates for smaller areas or
limited time scales.
Looking forward to a successful collaboration!
Feel free to distribute this letter.
John Inge Svendsen