Feb
19
Mon
2018
Ice2ice statistics workshop for PhDs (and others)
Feb 19 – Feb 23 all-day

Download the full invitation here; Ice2ice statistics course for PhDs

Week 8, 19-23 February 2018@ Copenhagen, DK

venue TBD

Organisers:

Martin Miles, Uni Research, Bergen

Ida Margrethe Ringgaard, University of Copenhagen / Danish Meteorological Institute

Lecturers:

Martin Miles, Uni Research, Bergen

Francesco Muschitiello, Uni Research, Bergen

—————-

“Statistics is a fascinating subject – unfortunately, its teaching is often excruciatingly dull.”– Foreword in a classic statistics textbook.

The ice2ice statistics workshop aims – in contrast – to be an interesting, illustrative and interactive environment, in which we present and explore the use of statistics and other quantitative methods in climate, paleoclimate, paleoceanography and other geosciences.

We will have a few formal lectures, complemented by lots of informal learning and interactive exchanges between lecturers and participants, and between participants. We will work hands-on in small groups and individually on some example data and our own data sets (paleo proxy, observations and/or model data), trying out different methods on the data sets. We will use “R”, a free and comprehensive software environment for statistical computing and graphics: https://www.r-project.org/

Lectures will cover introductory to advanced concepts and methods, adapted to the interests of the participants. Preliminary topics include:

  • Inferential statistics I and II: Theory and methods of univariate and multivariate statistics, including significance and resampling statistics, e.g., bootstrapping and Monte Carlo simulation methods
  • Time series analysis: time-, frequency- and time-frequency domain (e.g., wavelets)
  • Spatial analysis: geostatistics and more, including spatial autocorrelation and its impacts

The workshop is intended primarily for ice2ice PhD students, and will span 3 or 4 days during week 8 (19-23 February), including a social evening of course. Participation by others from ice2ice is also welcome: Remember you can always learn more statistics!

Please send an email to express your interest: martin.miles@uni.no or iri@dmi.dk. Please include any relevant comments (personal goals for the workshop, special topics of interest, partial attendance, etc.).

Feb
21
Wed
2018
Presentation Phd Outline @ PhD room, Dept. of Earth Science
Feb 21 @ 09:15 – 11:00

Karita Kajanto and Anaïs Bretones are both presenting an outline for the PhD thesis.

Venue: PhD room at Dept. of Earth Science, Bergen.

Mar
1
Thu
2018
PI meeting @ CPH
Mar 1 – Mar 2 all-day
Mar
6
Tue
2018
DMI/NBI meeting @NBI
Mar 6 @ 09:00 – 12:00

ice2ice DMI/NBI meeting @NBI

Agenda:

-Ida- update from statistics workshop

-Ida -Sea ice retreat and cold European winter revisited

-Paul- update on Iodine-sea ice Holocene record

-Mari- Abrupt changes in sea ice and Dansgaard-Oeschger events

 

If you have other items for the agenda, please let Helle know.

 

Mar
16
Fri
2018
Arctic glacier field course, Disko Island
Mar 16 – Mar 26 all-day

The course on Disko Island, western Greenland will offer hands-on research based teaching in the field of ice core science. Introducing participants to key scientific methods critical for understanding past and present climate changes in the Arctic. The field course is interdisciplinary, and will provide training in extracting and analysing ice cores as well as in understanding Arctic climate changes on multiple timescales based on ice cores and ice core proxies. In addition to the empirically based studies, the course will provide an opportunity to study the impact of changes in Arctic climate on glaciers and marginal ice caps on Greenland using a ssimple dynamical glacier model. Through the course, PhDs will learn the theory behind and gain experience with a set of highly relevant field based techniques for extracting climate archives from ice cores. This is currently not covered by traditional graduate programs in Norway.

Partners in the field course include University of Bergen (ice dynamics and paleoclimate), University of Copenhagen (ice core techniques), University of Zurich (dynamical ice modelling), and Scripps Institution of Oceanography (ice-ocean interactions).

Description of activity: During the field course, the participants will be working in groups alternating between learning the theory behind ice coring techniques (snow sampling, snow pits, shallow drilling, deep drilling), ice core proxies (water isotopes, chemical impurities, dating techniques, uncertainties), dynamical modelling of small ice caps (numerical ice flow modelling, SIA, mass balance), dynamics of marine terminating glaciers (ice-ocean interactions, fjord circulation, subglacial discharge, calving laws), as well as hands-on training in the field (including safety when traveling on a glacier). The icecoring will take place on a local ice cap lead by Dorthe Dahl Jensen (NBI), and the lectures and ice modelling activities will take place in Arctic station lead by Kerim H. Nisancioglu (UiB), Andreas Vieli (Zurich) and Fiamma Straneo (Scripps).

Preliminary analysis of the ice core data as well as snow samples obtained (including use of a Piccaro) will be carried out at Arctic station, which is fully equipped with lab spaces and lecture facilities. We will also take advantage of the unique records of climate, fjord hydrography and sea ice conditions from west Greenland available at the station, which is the oldest Arctic research station in the world.

Objectives: Introduce students to field and lab based methods necessary to retrieve key climate data documenting variability of temperature and mass balance of typical Arctic glaciers, as well as to simple dynamical models for understanding the transient response of glaciers and small ice caps to climate changes.

Outcome: Following the course the students will have in-depth insight into ice coring techniques, ice core proxy analysis, a basic understanding of ice dynamics, and hands-on experience with numerical ice flow modelling. The course will also foster a strong international network of PhDs and lecturers in polar climate science.

Responsible: Kerim Hestnes Nisancioglu (GEO/UiB & CEED/UiO) and Dorthe Dahl Jensen (NBI/KU).

Invited lecturers: Andreas Vieli (University of Zurich) and Fiamma Straneo (Scripps/UCSD).

When: 10 days, 16th to 26th of March 2018 (excluding travel to/from Arctic Station).

Where: Arctic Station, Qeqertarsuaq, Disko Island, Greenland

Participants: max 18 PhD students (from Norway, KU and Scripps) merit based.

Costs: 8000NOK/participant to cover accommodation and food at Arctic Station. Travel to
Qeqertarsuaq must be covered by eacth participant (make sure to include travel days)

Credit points: 4 ECTS (lectures, field work, group work, and presentation of results)

Apr
5
Thu
2018
PI meeting @Bergen
Apr 5 – Apr 6 all-day
Apr
9
Mon
2018
EGU
Apr 9 – Apr 14 all-day
Apr
18
Wed
2018
Spatial ice maps – meeting @ DMI
Apr 18 @ 09:00 – 11:00

Discussing B1 Total air content papers – as described in all staff meeting.

May
2
Wed
2018
Workshop: Paleoclimate states as future climate analogues @ DMI
May 2 – May 3 all-day

Workshop: Paleoclimate states as future climate analogues

Location: DMI, Copenhagen

Time: From 09:00 2nd of may -3 May 2018

Organizers: Rasmus (CIC), Peter, Shuting, and Ida (DMI)

Participants: ice2ice partners (potentially few relevant external collaborators)

 

You can find the agenda here:  Agenda_Analogues-workshop

You can find directions here: Getting_to_DMI

 

 

Please sign up using the following link, and share your ideas to help us shape the workshop:

https://goo.gl/forms/ysV71TBKYjvD7rHr2

[**Please sign up by March 23**]

  1. Contributions from both proxy and modeling experts are crucial for a successful workshop.

We hope to see many of you in Copenhagen soon!

 

Description:

One of the key themes in ice2ice is to what extent past abrupt changes have relevance for future climate change. Inspired by potentially similar warming trends in past (stadial-interstadial and glacial-interglacial) climates and future scenarios, we will discuss the applicability of paleoclimate states as analogues for future warming.

This workshop aims to intercompare proxy data reconstructions, paleoclimate modelling efforts, and future model projections with a particular focus on sea ice related warming in the Arctic (especially Greenland and the Nordic Seas region).

Specific topics during the workshop will be:

  • Rate of warming and sea ice loss

Are the rates of warming and sea ice loss in the past, eg. MIS3 stadial-interstadials or the deglaciation (proxy + model), and future scenarios (model) comparable? When we talk of past and current/future change in the Arctic, how good is the analogue in terms of abruptness?

  • Nordic Seas vs central Arctic Ocean

Comparison of past sea ice changes in the Nordic Seas (proxy + model) to future changes in the Arctic Ocean (model). If changes in the Nordic Seas during MIS3 should be used as a parallel for potential changes in the Arctic Ocean in a warmer climate (interglacial or future), two questions arise: how do the two oceans compare (e.g. vertical structure) and how would SST/sea ice changes in the two regions affect the atmosphere/Greenland. Specifically, can we use our collective model and proxy data to answer: (1) Is the impact of sea ice loss/SST increase similar for Nordic Seas (MIS3) and Arctic Ocean (interglacial or future), and (2) could the same mechanism lead to abrupt changes?

  • Different drivers

When comparing current-to-future climate change with preindustrial-to-last-interglacial changes, or when comparing current-to-future with stadial-to-interstadial changes, we need to consider the different driving mechanisms. Compared to the “apparently unforced” stadial-to-interstadial changes, the two former changes are forced by variations in GHG concentrations and insolation, respectively. To what extent can the different signatures of insolation and GHG changes be disregarded? There are indications that the resulting SST state is dominant for many atmospheric impacts, such that the driver is of less importance, but this needs to be addressed carefully when making past vs future analogues.

Contributions to the above from both the proxy and modeling sides is crucial to a successful outcome of the workshop.

 

May
3
Thu
2018
PI meeting@ CPH
May 3 – May 4 all-day
ice2ice 56 month financial reporting upload
May 3 @ 12:01 – 13:01

Form C signed and CFS uploaded in the portal

Summary of any changes to the draft/preliminary template/report

May
18
Fri
2018
Talk by Mehmet Ilicak – A novel method to represent mesoscale eddies in the ocean @ RF016, NBI, Denmark
May 18 @ 11:00 – 12:00

Mehmet Ilicak (Bergen) will give a talk on Friday, May 18 at 11am in RF016, NBI, Denmark he will discuss:
A novel method to represent mesoscale eddies in the ocean

May
24
Thu
2018
PI meeting @ Bergen
May 24 – May 25 all-day

PI science discussion:

Follow-up to Martin S’s see saw paper: Synergy paper including proxy data, and various Paleo-exps, MAS+Chuncheng+Margit+trond

Self organized map procedure NAO orientation-need to know what the proxies says. (Trond and Jens follow up, science point at PI meeting invite Martin Stendel and Chuncheng in end May PI meeting)

Jun
18
Mon
2018
Msc defense and talk on shallow cores from 2015 traverse
Jun 18 @ 09:00 – 12:00

Msc Sam Black will defend his thesis investigating the chemistry in the Greenland shallow traverse cores obtained in 2015. Further Msc Patrick Stephan Zens defended his thesis in Uppsala in end of May, and has agreed to update us on his findings following the defense of Sam. You are all most welcome to join.

Below the two abstracts

 

Analysis of chemistry in 6 shallow cores from Northern Greenland

by Sam Black

This report examines a series of 6 short firn cores collected from the Greenland Ice Sheet in May 2015. The cores were collected by hand using a IDDO drill during the traverse from NEEM to NGRIP and analysed at the Centre for Ice and Climate using the institutions continuous flow analysis system. More specifically, this report aims to present a number of different ice core proxies measured from the cores, their similarities, differences and causes.

Aerosol Input and Snow Accumulation Rates on the Northern Greenland Ice Sheet –Reconstructed by means of Continuous Flow Analysis (CFA) of 6 shallow firn cores
by Patrick Stephan Zens

Ice, firn and snow cores from the Greenland ice sheet offer a unique opportunity to reconstruct past climate conditions. These can be analyzed with continuous flow analysis (CFA) in order to acquire proxy information about ancient atmospheric aerosol concentrations, snow accumulation rates or temperature variations, atmospheric composition, solar activity as well as volcanism and biological activity.
This project deals with high-resolution CFA applied on six shallow firn cores (A1-A6) from Northern Greenland taken during a 456 km long traverse from the deep ice core drilling sites NEEM to that called EGRIP. The practical part included CFA measurements by means of fluorescence spectroscopy for obtaining NH4 +, Ca2+ and H2O2, absorption spectroscopy for H+, an ion selective electrode (ISE) for Na+ as well as insoluble dust and water electrolytic conductivity measurements.
The analytical part consisted of calibrations of the measurements, the reconstruction of the depth scale of the snow/firn cores and defining annual layers using H2O2. Field density measurements and the annual layer thicknesses were used to identify annual mean snow accumulation rates.
These high-resolution firn records allowed determining accurate monthly maximum and minimum aerosol concentrations in order to evaluate seasonal deposition patterns and validate the applied dating method. The reconstructed ages ranged from 17 ± 1 to 54 ± 2 years along a northwest-southeast gradient. Statistical tests resulted merely for H2O2 in correlations between the three western cores, probably explained by the dating method, which forces the annual summer maxima and winter minima of H2O2 to correlate. Trend analysis resulted in no significant changes over time except for the conductivity measurements of the two longest/oldest firn cores. This is associated with decreasing acidifying anthropogenic sulfur emissions since the 1970’s.
Annual mean snow accumulation rates ranged from 0.235 ± 0.061 m w.eq.a-1 in the very west of the traverse to 0.103 ± 0.036 m w.eq.a-1 centered on the Greenland ice-divide. Correlation maps derived from ERA-Interim reanalysis were used, to indicate potential correlations between the six firn cores. Similar to the results for H2O2, a significant correlation could only be determined between the three westernmost cores. A significant increasing trend of snow accumulation since the 1960’s was
detectable for core A6 in the ice sheet’s interior.
These traverse cores represent point measurements in a large, highly variable and poorly studied region of Northern Greenland. Hence, more extensive investigations are essential to reduce the uncertainty, cancel out influencing snow surface processes and improve the representativeness of isolated locations. Conclusively, the produced results update impurity and accumulation datasets until 2015, determine trends and provide input for surface mass balance estimations and ground truth data
for satellite observations.

Keywords: Continuous flow analysis, Greenland, Shallow firn core, Aerosol, Snow accumulation,
Glaciochemistry

Jul
23
Mon
2018
ESOF18 – EuroScience Open Forum
Jul 23 – Jul 27 all-day

The EuroScience Open Forum will be hosted in July 2018 in Toulouse, France. The Université Fédérale Toulouse Midi-Pyrénées, together with an impressive number of national and regional institutions and partners, will be responsible for the event. Toulouse and the Région Occitanie offer a comprehensive research portfolio covering all disciplines and providing a scientific environment of great international repute with strong links with the industry, that ranks among the highest in France in terms of scientific production. EuroScience is convinced that Toulouse will add its name as another major European city to the European Cities of Science that have organized ESOF since 2004 in Stockholm.