4th semester
DC1 ALESSANDRO CUZZERI OCTOBER 24 - MARCH 25
Months 19-21 (October - December 2024): Participation in the Tawani 2025 Lake Untersee Expedition, Antarctica (Oct – Dec 2024).
November 2024: Tawani 2025 Lake Untersee Expedition, Antarctica. Sampling and preliminary sample preparation procedures. Biostatistical analyses for own paper (Intra-seasonal trends of cryoconite bacterial communities on an Alpine Glacier).
December 2024: Tawani 2025 Lake Untersee Expedition, Antarctica. Sampling and preliminary sample preparation procedures. Biostatistic analyses for own paper (Intra-seasonal trends of cryoconite bacterial communities on an Alpine Glacier).
Month 22 (January 2025): Data analysis planning for Antarctica samples in collaboration with Team Anesio and drafting of policy brief on “Geotextiles on Alpine glaciers: science-driven recommendations and good practices”.
February 2025)– Total-RNA pipeline setup for upcoming analyses on local HPC cluster. Biostatistical analyses and beginning of drafting of own paper (Intra-seasonal trends of cryoconite bacterial communities on an Alpine Glacier).
Month 24 (March 2025) – Drafting of deliverable “An estimation of the microbial biomass and activity originating from the atmosphere and deposited on glacier surfaces”. Sequencing and bioinformatics of samples from 2023 Antarctica expedition..
DC6 KLARA KOHLER NOVEMBER 24 - APRIL 25
At the beginning of November, I attended the Nordic Branch Meeting, an annual conference of the Scandinavian branch of the International Glaciological Society (IGS). In mid-November, I had my midterm evaluation, which included a 45- minute presentation about my work and the status of my PhD, followed by approximately one hour of questions from my external examiner, Professor Kate Hendry (Ocean Climate Scientist at the British Antarctic Survey).
In December, I carried out the first round of a crushing experiments with sediment samples from Ilulissat, Greenland, and measured the difference in concentration of nutrients (N, P, Si, Fe) released into solution from the crushed and non- crushed sediments. At the end of December, I visited the GFZ in Potsdam, Germany, for a week to carry out XRD measurements on these crushed and uncrushed sediment samples.
At the beginning of January, I attended the Greenland Ice Sheet Seminar at our Risø Campus in Roskilde, Denmark. For the rest of the month I concentrated on organising and preparing the lab experiments that I started at the end of January.
In February, I spent most of the days in the lab. I started a time series on the nutrient dynamics between glacier sediments and pore water, measuring how the concentrations of N, P, Si and Fe change over time between dissolved in the pore water and available at the sediment surface. This time series will last about six months. In mid-February, I also attended the PhD Bundle Meeting, a meeting for all PhD students and supervisors in our department; this year's topic was “Insights and Reflections on the PhD Experience.”
In March I continued lab work. I continued working on the time series and conducted a second crushing experiment, where I crushed sediments and measured the concentration of released nutrients from the sediment into solution. For this experiment I used glacial sediments that I collected in Kangerlussuaq, Greenland in the summer of 2024. I also took care of the preparations for my fieldwork in September and October this year, for which I had to pack and ship all the equipment I need for the expedition.
In April, I started processing the data from this year's lab work. At the end of April, I attended the EGU Conference in Vienna, Austria, together with other PhD students from our IceBio network. At the conference, I gave a talk about my research topic, glacial flour, and how it serves as a nutrient source for the subglacial and downstream environment.
DC7 MARCO AJMAR JAN 25 - June 25
Month 18 (January 2025): I started writing my PhD transfer report and prepared sampling gears for Svalbard fieldwork.
Month 19 (February 2025): I measured dissolved silica, phosphate and alkalinity of Iceland 2024 river water samples. I also carried out ICP-OES analyses of the same river samples plus snow and ice samples from Svalbard 2023 fieldwork. I analysed and processed all data gathered during lab-work.
Month 20 (March 2025): I finished writing my PhD transfer report and prepared its presentation. I also set up a suitable power source for nutrient sensor deployment. I then tested phosphate and nitrate sensors in a lake in Potsdam and started packing for the Iceland fieldwork in April.
Month 21 (April 2025): After presenting my PhD transfer report, I completed fieldwork packing and preparation. From 09/04 to 17/04 I was on secondment/fieldwork in Iceland near the Langjokull glacier. We deployed for five days in a glacial river (Hvita) nitrate, phosphate and dissolved silica sensors from ClearWater Sensors, alongside pH, turbidity, conductivity, dissolved oxygen and dissolved organic matter sensors. We also sampled the glacial river from the glacier to the fjord for both inorganic and organic dissolved nutrients.
Month 22 (May 2025): I conducted a three week long secondment at Aarhus University for low level dissolved P and N species analysis on samples from Svalbard 2025 and Greenland 2024 fieldworks. I did DNA extractions (together with DC5 Anirban Majumder) of samples from Iceland 2024 and Svalbard 2025 fieldwork.
Month 23 (June 2025) I was on secondment (with DC6 Klara Koehler) at ClearWater Sensors in Southampton for sensors testing, maintenance and deployment planning. We processed data obtained during the secondment at Aarhus University and started packing for the August Summer fieldwork. I also completed a draft of the nutrient sensors deliverable
DC8 SILJE WAALER FEBruary 25 - JULY 25
Month 19 (Feb. 2025): I went to the British Antarctic Survey in Cambridge to undertake the analysis of DSi collected in Svalbard and mainland Norway as well as sequential extraction on sediments from Kongsfjorden. This involved learning how to operate a SEAL AA500 Segmented Flow Analyser and adjust to accommodate matrix of seawater.
Month 20 (March 2025): I focused on analysing data retrieved through my visit at BAS and NTNU. Moreover, I looked into the CTD data retrieved from our field campaigns in Kongsfjorden using a RStudio script provided by NPI researcher Allison Bailey.
Month 21 (April 2025): The work conducted in March continued into April. Time was also spent on planning out my upcoming secondment at AU in May.
Month 22 (May 2025): I made a thorough plan for my secondment at AU and read up on literature related to the topic. Half way into May went to AU and started extracting DNA from my samples. Moreover, I also did amplicon sequencing for 16s in collaboration Assistant Prof. Thanassis Zervas.
Month 23 (June 2025): I continued the work on microbial molecular techniques as part of my secondment at AU. Moreover, I started doing qPCR on target genes involved with nitrogen cycling. During my secondment at AU, I also started writing on my introduction and method section for my first paper.
Month 24 (July 2025): I went back to AU despite my secondment being over, to conduct my dissolution experiment at AU in collaboration with ICEBIO DC Klara Koehler and Postdoc. Beatriz Gill Olivas. In this period, I also worked on my deliverable for ICEBIO on glacial flours ability to increase crop yield.
DC5 ANIRBAN MAJUMDER january 25 - JUNE 25
Month 19 (Jan 25): The new year began with preparations for the winter fieldwork in Svalbard. Most of my time was dedicated to organising the logistics and planning for the expedition. Simultaneously, I was collaborating with colleagues from BAM on metabolomics bioinformatics data analysis and processing. I also submitted an abstract for EGU 2025.
Month 20 (Feb 25 ): was one of the members from the winter Svalbard fieldwork held between 8-22 February 2025. During this period, I collected ice cores and snow samples for Chapter 3 of my thesis.
Month 21 (March 25): This month, I primarily focused on metabolomics data analysis, particularly on understanding the pre-processing steps for mass spectrometry data.
Month 22 (April 25): Back in the lab, I resumed work on DNA/RNA co-extraction from samples collected during different field campaigns last year, 2024 and this year, 2025. At the same time, I continued with the data analysis of metabolomics datasets from both the Greenland fieldwork (Chapter 2) and the Svalbard fieldwork (Chapter 3). I also prepared a poster for the EGU 2025 conference.
Month 23 (May 25): I presented a poster at the European Geosciences Union (EGU 2025) conference, which was held in Vienna from 26 April to 2 May 2025. After the conference, I continued with lab work, focusing on DNA/RNA co-extraction. The extracted samples were then sent to our collaborators at RISO, Aarhus University, Denmark, for amplicon sequencing.
Month 24 (June 25): I continued the labwork with preparation for metabolite extraction. Also, the last set of DNA samples was sent to RISO for sequencing. Simultaneously, I was also doing metabolomics and amplicon 16S data analysis and structuring my thesis.
DC4 LARS VAN DIJK February 25 - July 25
Month 19 (Feb. 24): Regular sampling of the microcosms continued throughout the 170-day incubation experiment on pesticide degradation by cryoconite microbial communities (through the end of May). I organized department’s biannual PhD bundle meeting themed “Insights and Reflections on the PhD Experience” and attended the PhD writing camp, where I drafted my first manuscript, shared writing tips and tricks, and took part in small workshops.
Month 20: Following my January midterm examiner’s advice, I performed additional analyses on the microbial diversity of dispersed and submerged cryoconite. I also preread and gathered literature for the upcoming deliverable on the microbial diversity of the subglacial microbiome.
Month 21 (April 25): I presented my research via poster at the European Geosciences Union conference in Vienna and co-organized our department’s annual seminar on workplace inclusivity, centering on nationalities and cultural clashes.
Month 22:I ended the long-term incubation experiment on pesticide degradation by cryoconite microbial communities and prepared all samples taken during this period for DNA/RNA co-extraction. I also attempted to isolate single cyanobacterial filaments from my enrichments, which proved too challenging, so plate-streak isolation was done instead.
Month 23: Samples were selected and processed for DNA/RNA co-extraction. I then initiated qPCR on these extracts, targeting the 16S rRNA gene and key pesticide-degradation genes.
Month 24 (July 25): qPCR analyses continued, targeted isolation of pesticide-degrading microbes via enrichment plating was started, and samples were prepared and sent for total RNA metatranscriptomic sequencing.
