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PaleoENSO workshop

Dates:
26.08 - 30.08.2019  
Venue:
Belitung Island, Indonesia
Contact person:
Mary Elliot, This email address is being protected from spambots. You need JavaScript enabled to view it.

The PAGES-supported PaleoENSO workshop will be take place from 26-30 August 2019 on Belitung Island, Indonesia.

Venue

Hotel Santika

Logistics

Belitung Island is a one-hour flight from Jakarta.

This workshop is being organized in collaboration with members of PAGES' 2k Network CoralHydro2k project.

The date for this workshop has been defined a week ahead of the 13th International Conference on Paleoceanography (ICP) in Sydney, Australia, so that scientists can attend both and avoid multiple travel.

Description

A number of climate archives and modeling experiments provide insights into past ENSO variability. The aim of this workshop will be to gather key scientists working on ENSO reconstructions from proxy data and modeling and observational data to discuss recent findings and build a strategy for future studies.

The spatial and temporal coverage of each archive is often too limited to fully explore the response of ENSO to different background states. One aim will be to produce a multi-archive global data set by conducting data-model intercomparisons. The main focus of the workshop will be the Holocene (the past 10,000 year ago) but with the scope to explore older key periods such as the Last Glacial Maximum (20,000 years ago), previous inter-glacial periods 130-120,000 years ago).

Understanding the mechanisms of past, present and future ENSO variability requires modern observations, paleoclimatic data collection and general circulation coupled atmosphere-ocean climate models which use these sources of data to test their outputs and provide accurate predictions.

PaleoENSO variability is derived from seasonally resolved fossil corals and shells of marine bivalves, but also single foraminifera analyses which provide snapshots of past variance. Other terrestrial data is derived from speleothems, lake records and also tree rings. Each climate archives provides quantitative assessments of past ENSO variance through measures of inter-annual variability of atmospheric and oceanic processes.

In the past decade, numerous new studies have:
- provided records of Holocene ENSO variance;
- provided new statistical tools for extracting ENSO variance from proxy-data;
- explored novel tracers of environmental change;
- improved climate models have been able to reproduce more accurately modern and past ENSO variance.

Conclusions from these studies still differ on the factors that control past and future trends in ENSO: stochastic processes, insolation, a response to mean background state, a combination of these factors. Similarly projected future changes in ENSO are climate model dependent. The aim of this workshop will be to combine and cross correlate paleoENSO reconstructions derived from various climate archives and model experiments.

Outcomes

The main product of this meeting will be to:
1. integrate this information into a global database with a common scale of ENSO variance (i.e. we will produce a common scale to quantitatively estimate ENSO variance from different climate archives) and
2. integrate this data into climate models.

We will homogenise methods for quantifying ENSO variance and provide a common and quantitative metric of variability for all archives. This is a necessary step that will contribute to reducing uncertainties, increasing spatial and temporal coverage of interannual climate variability in the Tropics and understand the mechanisms of past and future ENSO variability.

Aims

A number of climate archives and modeling experiments provide insights into past ENSO variability. The aim of this workshop will be to bring together scientists working on ENSO reconstructions from proxy data and modeling and observational data to discuss recent findings and build a strategy for future studies.

The spatial and temporal coverage of each archive is often too sparce to fully explore the response of ENSO to different background states. One aim will be to produce a multi-archive global dataset by conducting data-model intercomparisons.

Registration

Register your interest to attend before 31 January 2019: https://docs.google.com/forms/d/e/1FAIpQLSesk7KpcWJOloGKEd_knfMj-fMToOYN_gnq-Vjh6xRIipUx7g/viewform

Financial support

A limited amount of PAGES funding is available for early-career researchers and/or scientists from developing countries. Please state in your expression of interest the reason/s financial support is required. Place numbers are limited to 50, and the steering committee will select candidates based on the information provided. Decision notifications will be sent to the applicants by the end of March 2019.

Key dates

Register your interest to participate the workshop deadline: 31 January 2019
Review of applications: February-March 2019
Registration and payment: April 2019

Steering committee

- Nerilie Abram, RSES, Australia National University, Australia
- Pascale Braconnot, LSCE, France
- Kim Cobb, Georgia Institute of Technology, USA
- Julien Emile-Geay, University of South California, USA
- Mike Evans, University of Maryland, USA
- Thomas Felis, MARUM - University of Bremen, Germany
- Helen McGregor, University of Wollongong, Australia

Further information

Please contact Mary Elliot (This email address is being protected from spambots. You need JavaScript enabled to view it.) and/or Sri Yudawati Cahyarini (This email address is being protected from spambots. You need JavaScript enabled to view it.) if you have any questions.

Go to the workshop website: http://lpg-umr6112.fr/ensoworkshop2019