Posts

New IPCC report presented

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On the 9th of August 2021 the IPCC sixth assessment report was presented in an online press conference.    The report can be accessed through: https://www.ipcc.ch/report/ar6/wg1/ And the accompanying Interactive Atlas though: https://interactive-atlas.ipcc.ch/ An online sea level tool has been produced together with NASA: https://sealevel.nasa.gov/data_tools/17 I've made a Q&A section here (under construction): http://aimeeslangen.blogspot.com/p/ipcc-ar6.html

IPCC final draft submitted!

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After 3 years of hard work, we have submitted the Final Government Draft of the IPCC Sixth Assessment report on the 12th of March! It's been quite the journey, with lots of challenges, but also lots of fun with a group of amazing people. Even though I've only met most of them just a couple of days in real life, because - well, COVID - it still feels like I've come to know all of them really well! Soon we will be able to share our assessment with the world, and when that happens I will also be sharing links to the sea-level projections in our chapter on this page: http://aimeeslangen.blogspot.com/p/ipcc-ar6.html  Update 29 March I just found out there is now a graphic novel about IPCC: https://becauseipcc.thesuccession.ca/ This image below is based on a photograph of the first Lead Author Meeting!

A lot can happen...

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in the space of 10 minutes! The other week, both Carolina and Tim received good news: an email saying that their paper had been accepted for publication in the Journal of Geophysical Research: Oceans - within 10 minutes of each other!  For Carolina, this is her first PhD paper, entitled ' Exploring sources of uncertainty in steric sea-level change estimates '.  In her paper, Carolina explores two potential sources of uncertainty in steric sea-level change estimates. First, she compared the global and regional steric changes in 15 different reconstructions. Second, she compared different noise models that can be used to represent the uncertainty in the data, and their effect on the steric sea-level trend. She finds that an auto-regressive order 1 model is most appropriate to describe the noise in the ensemble mean.  Carolina has made a short video to explain what she does in the paper. And if you would like to know more ... read the paper ! For Tim, this is his second PhD paper

MSc thesis opportunity

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At NIOZ, we are often looking for students to help us out with our sea-level research.  Note that the project below is no longer available, but may serve as an example of what would be possible. If you are interested in doing your thesis with us, please get in touch! ~~~~~~~ Present-day sea-level change along the coast of Brazil Project Summary Sea-level change is not a spatially uniform process. On the contrary, regional differences from the global mean sea-level change (~3 mm/yr from 1993-2017), can be large, reaching up to 15 mm/yr depending on the study region. Thus, understanding sea-level change regionally is critical for adaptation policies. Contrasting with the high number of studies focusing on European and North-American sea-level change, sea-level change at the coast of Brazil has been poorly investigated over the last decades. One of the reasons is the lack of data available in the region. Along the 7491 km of the Brazilian coast, there are only 12 tide gauges registered

A new chapter in the IPCC adventure

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It's been a while since my last post, and with good reason: from September to January I've been super busy writing the second order draft for the IPCC AR6 report (I'm planning to write a blogpost about my IPCC work in a while). Review for this draft will be open to experts and governments from 2 March to 26 April, so we invite everyone to have a look and provide us with feedback.  In the mean time, I've also supervised my students, given guest lectures at Utrecht University, co-organised the NIOZ days and finished my management course. Also, there has been some good news for my lab: * the first paper of Tim Hermans, PhD student in my group, has been accepted for publication in Climate Dynamics   * An H2020 proposal for the PROTECT consortium I'm part of has been granted. The project focuses on the contributions of ice sheets and glaciers to sea-level change, and the coastal impacts. At NIOZ we will be hiring 1 postdoc on this project, so if you're lo

GIA summer school

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Sea level doesn’t only increase when the sea rises, but also when the land subsides! In the end, it’s all relative. To learn more about vertical land motion, Carolina and I attended the Glacial Isostatic Adjustment training school at Lantmäteriet in Gävle, the Swedish mapping, cadastral and land registration authority. Glacial Isostatic Adjustment, or GIA for short, refers to the adjustment of the Earth to the loading and unloading of large ice sheets. The adjustment leads to land uplift underneath former ice sheets, and subsidence around its margins. Sweden has many examples of GIA: you can find beaches that have been raised to heights of 200m over the past thousands of years. Once you could swim here, but now the sea is kilometers away! The training school held at Lantmäteriet was well organized, with very interesting lectures covering land uplift, sea-level change, geodetic observations, ice sheet dynamics and more. It was a great experience! [written by Tim Her

A day on the Navicula

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On the 6th of June, Tim and me joined Long and Theo at the RV Navicula to help with a 13hr station in the Oosterschelde. Both of us being modellers, it was a good experience to board a research vessel and help to collect data. We helped out with CTDs and Niskin Bottles , to sample how the properties of the Oosterschelde change during a tidal cycle. It was a fun day and we were lucky enough to have good weather! Photos by Long Jiang