CR
Cryospheric Sciences

Greenland ice sheet

Looking for the Window during Fieldwork

September 15, 2023
Looking for the Window during Fieldwork
Qaanaaq fjord in Northern Greenland, 79°N [Credits: Katie Sipes].

Arctic fieldwork is a meticulous dance with the ever-fickle weather, where nature’s temperament can determine the course of scientific endeavors. Rain or fog can swiftly put a halt to even the most well-laid plans. This holds true for Greenland, where proximity to the ice cap doesn’t shield researchers from the capriciousness of the climate. In August 2023, the Deep Purple ERC Project ...[Read More]

Did You Know That It Ain’t Easy Being Greenland?

June 16, 2023
Did You Know That It Ain’t Easy Being Greenland?
The shape of Greenland changes depending on the map projection. [Credit: Kate Berg]

As a reader of the Cryosphere blog, you may have spent a lot of time looking at the Greenland Ice Sheet, but do you really know what Greenland looks like? This “It Ain’t Easy Being Greenland” map is something I made for fun during the #30DayMapChallenge (an international project to complete one map a day during the month of November) and highlights how different the island country appears dependin ...[Read More]

Cryo Adventures – Installing a weather station on the Greenland Ice Sheet

September 2, 2022
Cryo Adventures – Installing a weather station on the Greenland Ice Sheet
Putting the final touches on the “old” weather station (right) and newly setup GC-Net station (center) at NEEM before leaving them for a year of measurements. Photo credit: Anja Rutishauser.

Soaking up the sun and recharging batteries on a peaceful and quiet summer day, or fighting to stay upright during extreme snow storms in the middle of winter, while continuously recording valuable air temperature, pressure, wind-speed and so much more – such is the life of an automatic weather station on the Greenland ice sheet. Even though they are so remote, sitting by themselves surround ...[Read More]

Camp Century re-visited: sediment from the bottom of a Cold War ice core reveals Greenland’s warm past

January 28, 2022
Camp Century re-visited: sediment from the bottom of a Cold War ice core reveals Greenland’s warm past
Historic photograph of the ice core drill rig inside a covered snow trench at Camp Century, northwestern Greenland in 1964. Source: Langway, 2008 [Credit: USACE/CRREL].

A Cold War nuclear-powered military base inside the Greenland Ice Sheet sounds like science fiction, but the science that came out of this U.S. army installation was anything but fiction. In last week’s EGU CR blog post, Paul Bierman and Amanda Schmidt discussed the advances made by the U.S. military in operating across the Greenland Ice Sheet that culminated in the establishment of Camp Century i ...[Read More]

Living IN the Greenland ice sheet: the story of Sites I and II, Camp Century’s older, smaller siblings

January 21, 2022
Living IN the Greenland ice sheet: the story of Sites I and II, Camp Century’s older, smaller siblings
Site I in 1953 or early 1954, just after installation and before it was buried by accumulating snow. These three main tubes each have a diameter of 5.4 meters. [Credits: U.S. Air Force]

Greenland, cold as it is, was appropriately front and center in the Cold War. Strategically placed between Europe and North America, the United States sought to maintain and enhance its position on the island so that American missiles and bombers were in striking range of many Soviet targets. Soviet bombers and missiles coming toward North America would streak over Greenland making early warning c ...[Read More]

Did you know about the weathering crust? Five things you never knew about glacier surfaces

August 20, 2021
Did you know about the weathering crust? Five things you never knew about glacier surfaces
The weathered surface of the Greenland Ice Sheet. Photo credit: Ian Stevens

To the untrained eye, the melting surface of glaciers and ice sheets can look a little boring. It’s bright in some places, dark in others, and there are lots of things to fall over and (hopefully not) get your feet wet in. However, a huge range of processes are occurring both upon and just underneath the ice surface, in a 50-ish cm thick layer of ice called the weathering crust (or the “crust” for ...[Read More]

Re-discovering the British North Greenland Expedition 1952-54

August 13, 2021
Re-discovering the British North Greenland Expedition 1952-54
Figure 1. Map of the major field localities (red dots), including the BNGE bases at Britannia Sø and North Ice, and the approximate traverse route (red lines) of the British North Greenland Expedition (adapted from Hamilton 1956). North East Greenland Ice Stream (NEGIS) is indicated. Base map is a multidirectional hillshade of the 100 m Arctic DEM (25x vertical exaggeration) overlain by the ITS LIVE 120 m ice velocity dataset. Both basemap datasets were accessed via https://qgreenland.org/ [credits: Neil Ross]

How did we (nearly) all forget about, or simply overlook, a large-scale two-year long mid-20th Century scientific expedition to the northern Greenland Ice Sheet? Particularly an expedition that kick-started some significant glaciological and geophysical careers, developed large-scale polar logistical capabilities, traversed the ice sheet, acquired some novel and critical data, and asked some big r ...[Read More]

Questions from space: what is snow and what is ice on the Greenland ice sheet?

July 2, 2021
Questions from space: what is snow and what is ice on the Greenland ice sheet?
Fig.1: Extremely dark bare ice at QAS_U automatic weather station on August 4, 2014. Credits: Jason E. Box

We usually think of a glacier as a white, clean surface. Well, this is only an idealized vision because in reality glaciers are far from immaculate, they can be colored! And this is extremely important since colored (dirty) ice absorbs more solar radiation than clean ice, accelerating melt. One of the places on Earth where it is fundamental to understand these processes is Greenland, where ice is ...[Read More]

Did you know … that liquid water can be held within a glacier?

January 29, 2021

Hidden below the surface of some glaciers, liquid water can be found within what is called the firn layer – the upper layer of a glacier where snow compacts into glacier ice. Liquid water may persist there for up to many years, forming what scientists call “firn aquifers.” While observations of seasonal firn aquifers have existed since the mid to late 1900s in several mountain glaciers, recent stu ...[Read More]

Image of the Week – Icebergs increase heat flux to glacier

January 15, 2021
Image of the Week – Icebergs increase heat flux to glacier
Iceberg in Sermilik Fjord. Figure credit: Donald Slater.

Icebergs are ubiquitous in Greenland’s fjords, melting and releasing freshwater as they float towards the open ocean. The amount of freshwater released from these icebergs can be vast – the equivalent of around 50,000 Olympic swimming pools per day in some fjords. New research reveals that this freshwater causes fjord currents to speed-up, which can actually increase the amount of heat delivered t ...[Read More]