More reflections on 2017 field work

Guest post by Jackie Hung:

Going to Cape Bounty for a second field season, the novelty of High Arctic field work has still not worn off. Seeing the Weatherhaven tents through the window of the Twin Otters as we circled the cape brought back all the memories of the previous season. That is, until we had to dig out the tents from over 2 metres of snow.

Opening camp was a completely new, rewarding, and humbling experience. Seeing the landscape transform from late-winter conditions to spring and summer growth gave me a new perspective on the amount of change that the land undergoes and the harsh environment that the flora and fauna endure here. I was able to finally see and take part in some of the research and data collection that is undertaken in the early season, including lake sampling and river channelizing. Coming to the field before the growing season has also given us the chance to see the birds in their nesting season. Camp has been frequented by several visitors so far, including large muskox herds, curious caribou, and large Arctic hares.

 

Snow sampling and working with data loggers that record soil temperature year-round at Cape Bounty. 

 The transition into July and the growing season was a welcome change for me as a soil scientist. We were keen to arrive early into the field to capture the spring-summer transition; however, that occurred a few weeks later than it did last season. The higher amount of snowfall in the Canadian Arctic this summer meant a delayed start to my sampling. My research builds on the knowledge base established from the previous season and looks to explore unanswered questions that came up during my field sampling and analysis. My Master’s research at Ryerson University looked at the spatial and temporal dynamics soil nitrogen availability and how it related to environmental variables in the wet sedge meadows. Moving forward, I am interested in examining the relationships between the soil available nitrogen, gas exchange, and the changing climate in the wet sedge meadows and mesic tundra and linking these questions to remote sensing techniques.

In 2017, my day-to-day activities included taking static CO₂ measurements, trace gas sampling, spectroradiometer work, and soil sampling. Carbon exchange autochambers and buried soil moisture and temperature loggers are allowing me to take continuous measurements in various locations to complement my seasonal data set. Soil samples taken from the field will be used towards laboratory experiments that will allow me to manipulate different biophysical features to see the microbial response the soils to elevated temperature and fertilization. This field season has given me a head start to the sampling for my new role as a Queen’s student and will help in formulating the questions that will form the basis of my Ph.D.

What grows here....

Guest post from M.Sc. student Valerie Freemantle

I am happy to say that my sampling has been going well and that Cape Bounty has started to feel like home. I wake up every morning looking out to the weather haven and West Lake. The days are long, but being outside and surrounded by science all day makes it such a rewarding place to work.

A view from the tent!

For my thesis, I am using digital pictures and satellite imagery in order to see if there has been any change in the vegetation cover at Cape Bounty since 2004. In the field, I have been revisiting plots that were sampled in 2004 and 2008 and using digital images to estimate the percent coverage of vegetation. When I return to Kingston, I will use these images to scale up to the satellite imagery this year. Then, I can relate these pictures and the data from 2004 and 2008 to satellite imagery and determine if there has been any change in vegetation between 2004 and 2017.

The vegetation in the Arctic has to be able to survive in some difficult conditions. The Arctic growing season is short and there is little on the landscape to block the wind. However, flowers still manage to survive in the slight depressions in the landscape where trickles of water flow soon after snowmelt.

For example, here are some Arctic poppies (Igutsat niqingit, Papaver spp.) blowing on a slope. They are all pointing towards the (never setting) summer sun. The areas where they have managed to establish themselves are in slight depressions where enough water flows to support lichens, mosses and flowers.

Arctic poppies

Another very common plant is the purple saxifrage (Aupilattunnguat, Saxifraga oppositifolia). This is the territorial flower of Nunavut. These little flowers provide bursts of colour all over Cape Bounty.

Purple saxifrage

The real powerhouse of sequestration in the Arctic is made up of vegetation like mosses and sedges. I need some more work learning to tell these apart, but there are many varieties of sedges and grasses at Cape Bounty. Here is a picture of some sedge and moss growing in a small water rack at the side of a rocky slope. The vegetation out here is pretty awesome.

Moss and sedges

Knowing how much vegetation is on the landscape is important. Vegetation is an important mechanism for removing carbon from the atmosphere and storing it. Generally, the Arctic has been considered a net sink of carbon, meaning that it stores more than it produces. Mosses and sedges are a big component of this storage. But, with the anticipated changes in Arctic climate due to climate change, there is the potential that this trend may change. Thus, the next step of my project will be to link any changes in vegetation cover to changes in carbon sequestration. I am planning on doing this by relating the trends in vegetation growth from the satellites to measurements of carbon intake and output from eddy covariance towers here at Cape Bounty.   

Research infrastructure

Autumn is a time when we are hard at work analysing the data from the past field season.  We also have to start to plan for the next season with many applications for funding due in November and permits to renew. Plans for 2014 are coming along nicely and we expect to be at CBAWO for almost three months.

A big part of operating a long term research program is to carry out basic, systematic measurements that are needed for all kinds of work.  These include weather, river, soil and lake measurements and they are the cornerstone of our efforts at CBAWO.  In this region of the Arctic, there are no systematic river or lake measurements taken by government agencies, and the nearest weather station is 300 km away at Mould Bay, so we really need to have good quality data for our research.  

This map shows the current primary measurement network.  There are a number of weather, river and lake stations that have been in operation from the beginning in 2003, and some like the small streams and soil stations that have been added since that time.  There are many other locations not shown here that are sampled regularly but this network is the core of CBAWO.

In the last two years, we have added time lapse cameras to this basic network.  We have two located on a plateau edge to provide images of the ice cover on each lake.  This is very important for us as we are not usually there when the ice forms in autumn, and in some years (like 2013), the ice comes off the lakes after we leave as well.  The cameras perform well but can be buried by snow, so we miss much of the winter.

We installed a time lapse camera on the West River station in 2013 as well, looking down stream at the river and lake.  The goal of this is to provide some visual indication of what happens at the river in our absence.