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Launch of the 50x30 Coalition

Limiting Overshoot of 1.5°C to Slow or Prevent
Cryosphere Collapse: 50% Emissions Reductions by 2030

Wednesday 21 April, 17:30-19:00 CEST/11:30 AM-01:00 PM EDT Virtual Event

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Watch again here:

Watch the entire Event

Polar Cut - Openings by Figueres and Bamber; Polar overshoot implications

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Individual science presentations:

About The Event

Through launch of the 50x30 Coalition, this event aims to inform and engage leaders to act on the results of the IPCC Special Reports on 1.5°C of Warming (SR1.5, 2018) and on the Ocean and Cryosphere in a Changing Climate (SROCC, 2019), as well as science to be included in the Sixth Assessment Report (AR6, 2021).

50x30 aims to highlight the damaging global impacts of “overshoot”, in which emissions remain too high to hold the Earth within 1.5°, or at least 2°C of warming: the temperature goal of the Paris Agreement. The consequences of overshoot are dangerously underestimated by the policy world. While there are other impacts from exceeding Paris limits, those from cryosphere standout, nearly all with global consequences that cannot be reversed on human timescales: unstoppable long-term sea-level rise, polar ocean acidification, loss of glacier- and snow-fed water resources, centuries-long permafrost carbon emissions.

Most governments and many businesses have pledged carbon neutrality by 2050; but the IPCC SR1.5 made clear that median global reductions of 50% are needed by 2030 to reach that neutrality goal; and almost no actors are doing so. 50x30 will raise up the policy plans of thosefew that do; making clear both that 1.5°C remains possible, and what will happen if we fail.

Speakers include IPCC scientists and 50x30-consistent governments who have endorsed the 50x30 Mission Statement.

50x30 Launch Event Program - April 21

All times in Central European Summer Time (CEST) and Eastern Daylight Time (EDT)

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    Christiana Figueres, former Executive Secretary, UNFCCC and Co-Founder, Global Optimism Ltd



     Dr. Jonathan Bamber, Bristol Glaciology Centre and former chair, EGU; IPCC AR4, AR5, SROCC

Voice from the Fastest-warming Place on Earth

     Dr. Heidi Sevestre, by satellite phone from Climate Sentinels Research Expedition, somewhere between Svea and         Hornsund, Spitzbergen Island, Svalbard (conditions permitting)

Science Panelists
     Dr. Julie Brigham-Grette, UMass-Amherst, AGU Fellow, former Chair US Polar Research Board
          Past is Present: What Paleo-climate Says About Overshoot
     Dr. Tim Naish, Antarctic Research Centre, University of Victoria/Wellington (NZ), IPCC AR5
          Melting Ice, Rising Seas: Overshoot and Antarctica
     Dr. Heidi Sevestre, Lecturer, University Centre in Svalbard/ICCI Outreach Director
          Glaciers and Snow: Long-Term Loss of Water Resources (recorded)
     Dr. Carol Turley, Plymouth Marine Laboratory (UK)
          Polar Oceans: Long-term Legacy of Overshoot
     Dr. Gustaf Hugelius, Bolin Centre for Climate Research (Sweden)
          Permafrost Thaw: Committing Six Generations to Negative Emissions
     Dr. Julienne Stroeve, NSIDC (U.S.)/University of Manitoba (Canada), IPCC SROCC
          Arctic Sea Ice Loss and Impacts Past 1.5°C



     Sandrine Dixson-Declève, Co-President, Club of Rome


What are 50% by 2030 Pathways?
     Dr. Joeri Rogelj, Grantham Institute, Imperial College London, IPCC SR1.5, AR5, AR6

Progress Towards 2030 To-Date

     Dr. Bill Hare, Founder and CEO, Climate Analytics, IPCC AR4

Proving the Possible: 50x30-Consistent Governments: United Kingdom

     Mr. Nigel Topping, COP-26 High-level Champion, United Kingdom

Proving the Possible: 50x30-Consistent Governments: Finland

     H.E. Krista Mikkonen, Minister of the Environment and Climate Change, Finland


The Challenge Ahead: Countries Nearing 50x30: Canada

     H.E. Elizabeth May, MP, Parliamentary Leader, Green Party (Canada)


     Selwin Charles Hart, Special Advisor to the UN Secretary-General on Climate Action and UN Assistant         Secretary-General for the Climate Action Team


‘In pathways with no or limited overshoot of 1.5°C,
CO2 emissions must decline 40-60% [median 50%] by 2030.’


- from Summary for Policymakers, IPCC Special Report on 1.5° of Warming, 2018.



Dr. Jonathan Bamber

Professor of glaciology and Director of the Bristol Glaciology Centre (UK),

former chair, EGU; IPCC AR5, AR6, SROCC

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Sandrine Dixson-Declève

Co-President of the Club of Rome

Honorary Guests

 Selwin Hart, Special Advisor to the UN

Selwin Charles Hart

Special Advisor to the UN Secretary-General on Climate Action and UN Assistant Secretary-General for the Climate Action Team

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Christiana Figueres 
Co-Founder Global Optimism Ltd, Former Executive Secretary, UNFCCC

High-level Segment

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Mr. Nigel Topping

COP-26 High-level Champion (UK)

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Dr. Bill Hare

Founder and CEO, Climate Analytics

 Krista Mekkonen, Minister of Climate an

H.E. Krista Mikkonen 

Minister of the Environment and

Climate Change (Finland)

Elizabeth May, MP, Parliamentary Leader,

Hon. Elizabeth May

MP, Parliamentary Leader,

Green Party (Canada)

Science Speakers


Dr. Heidi Sevestre

Global Outreach Director ICCI,

Guest Lecturer,

University Centre in Svalbard


Dr. Julie Brigham-Grette

Department of Geosciences 

University of Massachusetts-Amherst (U.S.)

AGU Fellow and former Chair, U.S. Polar Research Board

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Dr. Tim Naish

Antarctic Research Centre, University of Victoria/Wellington (New Zealand)


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Dr. Julienne Stroeve


University of Manitoba (Canada),

University College London (UK)


Carol Turley, Plymouth Marine Laboratory

 Dr. Carol Turley

OBE, Senior Scientist and Head of International Affairs, Plymouth Marine Laboratory (UK)

Gustaf Hugelius, Bolin Centre for Climat

Dr. Gustaf Hugelius

Bolin Centre for Climate Research (Sweden),

Co-chair, International Soil Carbon Network

Joeri Rogelj, Imperial College London,.j

Dr. Joeri Rogelj

Grantham Institute

Imperial College London (UK)

IPCC SR1.5, AR5, AR6

Founding Partners of the 50x30 Coalition

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50x30 is a partnership between cryosphere and climate science research institutions, and those governments that have meaningful 50% by 2030 reduction targets. Founding scientific institutions include the Bolin Centre for Climate Research/Stockholm University (Sweden), Grantham Institute of Climate and Environment at Imperial College London (UK), University of Massachusetts-Amherst (U.S.), Bristol University Glaciology Centre (UK), the Antarctic Research Centre/University of Victoria Wellington (New Zealand), American Geophysical Union (AGU), National Snow and Ice Data Center (NSIDC, U.S.), and Climate Analytics (Germany). Governments with 50x30 consistent targets include COP-26 host the United Kingdom, Denmark, Finland, Germany and Sweden. The International Crysophere Climate Initiative (ICCI, Sweden/U.S.) provides administrative support. 50x30 is made possible through foundation support from the Svenska Postkodsstiftelsen.

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