Hi! My name is Ms. Harsh. Please join me as I travel to Churchill Canada to study climate change.

Friday, April 30, 2010

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Monday, September 14, 2009

See Ya Soon!


Well today is our last day. We have processed all the samples as far as pH and conductivity- well over 200 total samples. Some of the samples have to be finished by the next Earthwatch group as far as the drying and loss on ignition test, the size of the muffle oven was the limiting factor on those tests. It has been a great experience. This is a very unique place. There are not any roads connecting it to other towns. All goods have to be brought in by boat, train or flown in. All the water here at the study center has to be pumped up- so water conservation is strictly enforced. The center here, along with the whole town also recycles, which is very important.
I have had many unique experiences here, belugas, bears, bugs, food and people. I have not been able to watch TV or use my cell phone at all and I have realized that many times people get so caught up in their own whole that we forget to stop and look around and experience life. Even though we were busy from 7 am until 9 pm every evening, I had a chance to stop and realize what a great world we live in and how much we often miss or take for grated. I want to challenge you to take a day- go for a hike, boat ride, or even just take a moment to sit outside and really take a close look at the world around you and ask yourself the question: am I doing my part to preserve and protect this great planet? or what can I do to help? Dr. Kershaw said it best; it is the individuals that will make the difference in this world- one person is the first step.










See you soon and enjoy the show.

Sunday, September 13, 2009

Dancing Sky




Late last night , our friend Bill was dutifully the muffle oven and happened to poke his head out the door and looked up and saw the aurora The news quickly spread and soon everyone was outside looking up at the sky. Swirls of light danced across the sky. You could actually see the ribbons move. We watched in awe as one ribbon made a circle and continued to move until the circle closed. We watched the lights for about a half an hour until the clouds moved in and covered them. We then retreated back to our rooms with our check list complete. We saw the belugas, the polar bears and the now the northern lights. The phenomenon of aurora is an interaction between the Earth's magnetic field and solar wind.
Auroras are produced by the collision of charged particles from Earth's magnetosphere, mostly electrons but also protons and heavier particles, with atoms and molecules of Earth's upper atmosphere. These particles get trapped in the Earth's magnetic field . The collisions in the atmosphere electrically excite electrons to take quantum leaps (a mechanism in which the electron's kinetic energy is converted to visible light); and molecules in the upper atmosphere. Watch the video for an explanation of how the lights are created.


Today we spent another day doing basically the same procedures, except by now each team has a distinct plan and everyone has their own job. We are really getting pretty efficient now. Tomorrow is lab day. We will continue to check pH and conductivity. This information can give some indication about the climate in which it was formed. Today we took samples as deep as 2 meters! We hit permafrost at about 50 cm, then we had to drill down until we hit rock or mineral. This depth varies with the site. Today the last core sample contained shells. Think about this. We are not near the bay where we are. This section of the continent is rebounding. As you drive away from the bay, you will drive over many differenty beach ridges that were formed when that area was the coastline in the past. The ice was very heavy and pushed the continent down to the asthenosphere. Now that the ice is gone the continent is rising thus the coastline is changing also. This is called isostatic rebound.


Today I talked to a scientist who studies polar bears. He told me that the population here is doing fine, even though the population is down about 25 percent. He has been studying bears here for 35 years. The health of the bears will vary with from year to year depending on the thickness of the sea ice, the amount of food available. etc. He and his partner fly out in a helicopter and search for bears. When the find them they will tranquilize them, then drop down and take measurements and blood samples. The bear really do not migrate
except in the winter when they go out on the ice looking for food. A preganate bear will almost double her weight in the winter. We saw another bear today. It walked around on the rocks before it decided to go for a swim. The people here say that they often see bear swimming - like they are playing! .






Saturday, September 12, 2009

Permafrost



Today we collected more samples- we did our peat pits,seedling samples but today we also did a permafrost core sample. I have learned alot about permafrost on this little adventure. Before I thought that permafrost was always the top layer of soil- but I have learned that the layer of permafrost can be just a few centimeters to several meters below the surface. Today we dug down to the permafrost layer- it was so hard that you couldn't break it with the shovel. We had to dig down 50 cm in one are and only 30 cm in another are. Of course we took soil samples and surveyed for seedlings. The upper layer that thaws in the summer is called the active layer. The thicker the active layer the larger the trees - the soil is thicker and warmer and more nutrients are available.


What is permafrost? (answer in your journal) What is the difference between continuous and discontinuous permafrost?


The thickness of permafrost can be altered by changes in the climate or disturbance of the surface. Permafrost thins and the active layer thickens when ground temperatures increase. Some 24 percent of land area in the Northern Hemisphere is underlain by perennially frozen ground. Another 57 percent -- extending down into much of the United States and Europe -- freezes seasonally. But the permafrost in some areas is declining and this is affecting the structures on the surface. Sometimes ponds will form when the ice melts and the soil above it collapses, roads have been damaged to name a couple. The effect is not just in the far north. Some 80 percent of U.S. soil freezes every winter. Change to the cycle will affect crops, native plants and even how much carbon is exchanged between Earth's surface and atmosphere. This is why research like Dr. Kershaw's is so important.




Friday, September 11, 2009


Guess what - saw a wolf outside my bedroom and I didn't have a single camera handy- neither did the other three people in the room! This picture is almost a perfect example of what I saw out the window. It was just walking by and stopped and continued on it's way down a small hill. This was going to be a great day. Well today is our day off and we are on our way, hopefully I will have some pictures to post for you tonight. We have a guide, Paul, who is going to take us around and hopefully show us some of the local wildlife. He has beening guiding here for many a years and knows all the local hangouts for animals.
We walked along a couple of beaches all the while Paul was pointing out the local fauna and describing some of its uses. We saw blueberries, gooseberries, dew berries and soap berries. Paul told us that you could take a batch and work them into a lather. I have tasted many of the local berries and they are great. Right over the next hill we saw our first bear. It was far away but you could see it great with binoculars. Paul knows alot about polar bears. I didn't know that male bears never quit growing, that they only ate the fat off the seals and that the mother bears doesn't eat for 8 months.


See what else you can find out about polar bears at http://www.polarbearsinternational.org/. Write 3 facts in your journal.
Down the next road we stopped to see some Canadian Eskimo Sled dogs. These dogs are not treated like pets- they are work animals. Notice they're legs- they are pigeon toed- just like polar bears. It helps with traction on the snowy grounds. While watching the dogs, we noticed not one but 2 bears sunning on the rocks. This was great. We didn't go to far because Paul told us that they could reach us in just 5 seconds.
We also saw arctic foxes (what adaptation do these animals have for living in this environment?), peregrine falcons, bald eagles, sandhill cranes and other shore birds. I even collected a couple of rocks that contained fossils!
Next on to beluga whales! (what does beluga mean?) We climbed the rocks at Cape Mary and there they were, swimming at the mouth of the Churchill River. We even saw baby belugas. Baby belugas are gray and will turn white as they mature.
Then we went to town-- take a look at the next slideshow.

Good luck on your tests!

Thursday, September 10, 2009

A Day In The Lab

We spent the morning doing lab work. We have collected approximately 67 samples from the FEN (wetland), TIS (tree island), BFR (burned forest) and the TUN (tundra). We divided up into teams. One team was in charge of determing the moisture and organic matter content of each sample and the other team was in charge of determing the color, pH, and conductivity. Each of these tests can tell the scientist relys different information about the properties of the soil.

Working in a lab can be very difficult if there is not good communication between the workers. So first we had to develope a system for all the testing and a way to record all the data.

Team 1- moved to the back lab to work on moisture content and organic matter content. To determine the amount of moisture each sample had to be weighed before and after it was dried it in an oven at 105°C for 12 hours. Then a small sample of it was transferred to a crucible and burned the sample in a Muffle oven (550°C for 3 hours) to figure out how much organic matter there was in the soil. This tolwill help us to determine much carbon was present in each sample . Dr. Kershaw can then use this information to determine the "carbon pool". This is important because it tells us how much carbon can be released in the atmosphere if the permafrost melts because when organic matter decomposes it releases carbon dioxide, a greenhouse gas.

video
Team 2- stayed in the classroom and set up an area to test pH, conductivity and soil color. A sample was removed from the bag and was made into a paste, then we used electric probe to measure conductivity. This tells us how much salt is in the soil, again giving us another characteristic of the soil system. Generally soils closer to the coast have a higher salt content, therefore a higher conductivity. Soil pH is a measure of acidity or alkalinity. An acid solution has a pH value less than 7. Many plants and microorganisms prefer either alkaline or acidic conditions and the pH can affect the availability of nutrients in the soil. Next, a small sample was placed on white paper and the color was identified using the Munsell Soil identification chart. This is an internationally agreed upon table to describe the colors of different soils and can give a person information about the quality of the soil.

After lunch we set out with our bear monitor, Carley, and went to the burned forest. The forest has burned twice in the past, once in the 1980's and once in the 1990's. Each group dug three more pits and collected samples from the soil profile. Then once again looked for new seedlings. The bugs were aweful!!! Even in full bug gear one managed to find its way to my nose!

Well tomorrow is our day off! We have a guide who will hopefully be able to guide us to the polar bears and beluga whales!

Please use the comment section to post questions about the research. I know we will be able to answer them.






http://nsidc.org/cgi-bin/words/glossary.pl use this to define a PALSA, PINGO, HUMMOCK (please post the answer in the comment section)
http://sv.berkeley.edu/showcase/flash/juicebar.html

Wednesday, September 9, 2009

FENS and Tree Islands





Hey guys,

The weather here is highly variable. The last couple of days were cold and rainy and then today it was warm and rainy. I decided that I like the cold and windy better! When it is cold and windy the mosquitos and black flies don't bother you, but as soon as the wind stops - here they come. We had to wear bug nets all day today! They obscure your vision somewhat and make it a little harder to get your work done.

Today we had our morning meeting and we discussed the days protocols and procedures. Our task was to go to several sites and collect organic matter samples and do a seedling survey of the areas as well. Our first site was called a FEN or wetland. As we exited the van we were immediately greeted by swarms of bugs-- black bugs, mosquitos, and bulldogs so we all donned our bug nets and proceeded with the days assignment. After a short walk through a stand of trees, we proceed through the standing water and you could see bubbles coming up in the water. Where do you think these bubbles came from? This were methane bubbles produced by anaerobic decompostion. We scattered out to pick random plots to sample.


We had a unique way of selecting our plots. You take your shovel and throw it as far as you can and where ever it lands that is where you dig. Our team dug three pits and took soil samples from 0-10 cm, 10-20 and 20-30 cm below the surface. We had to be very careful and make sure that everyone was following the same protocols. We had special way that we have to label each sample- site name, group, date, and pit number depth. It is very hard to do all of this in the rain. We also have to take pictures with the information on a board. DATA, lots and and lots of DATA. We repeated this same procedure at another site called TIS- tree island. We acutally found some seedlings here, they were but a mere 1 cm and they were 2 years old.

After getting the samples back to the station, they were weighed and placed in a drying oven to remove the moisture, then they will be weighed again. Next we will take a small sample and place it in a muffle oven and heat it to 675* essentially burning it. The ashes will be removed and then weighed and the carbon content can be determined. Dr. Kershaw wants to try to determine the amount of carbon in the peatlands that can possibly decompose and release carbon dioxide into the atmosphere. We are studying the trees to see if there is any type of shift in the treeline- that could be an indication that the climate is changing. He did note that a tree found here, the poplar, is increasing in number which could also indicate that something is going on.

We had a great lecture tonight on Glacial Geomorphology- Extra credit if you can tell me what palsas, pingos and polygonal peat plateaus are.

This is a great place- it has an observation dome in the roof! I haven't been able to see anything out of it but it was still neat to look through.