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May 4 : Starting intensive sampling

After two days sampling in cloudy/snowy conditions, the sun was back for an ideal sampling time on the shinny ice of the Yenisey.
Current temperatures are quite cold about -3 to -6 °C during day and from -10 to -18 °C at night.
Thus ice is still thick (near 1m) and there are almost no sign of melting.
Fishermen in their cabines still have some great days of fishing to comme.
According to weather forecast, positive temperature should occur on friday, let see what happen next!

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May 2: Back in Igarka

Beautiful view from the plain over the frozen Yenisei and the city of Igarka.
The weather was very sunny and warm for the arrival, and everything was starting melting.
But now a cold wave has come, bringing some snow and refreezing.
Lab material and goods have been checked, we are ready to go!
First sample of the spring mission has been taken through the ice of the river on Friday 29/04 on a sunnybut cold day (between -10 and -5 °C).

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June 16: Igarka’s paradoxal charms!

Today we further discovered local watersheds.
We went sampling the Fox creek and Gravika river (samples for sediment’s transport and sonde’s measurements).
These  relatively small rivers are two Yeniseï tributaries with different regimes.
Fox creek has generally high level of suspended matter and turbidity whereas the Gravika has most of the time clear water.
The warm season is now well engaged with green landscapes and beautiful flowers but also awful clouds of mosquitos!
Igarka’s paradoxal charms! »
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June 7: Ienisseï free of ice

The Ieniseï is now totally free of ice and the last icebergs have been replaced by fisherman’s boats. The access to the field is easier since the branche has defrosted and enables us to  sample on a daily basis the first stage of the flood recession. Windy days might be a harsh time when sampling on board of our small embarcation because of the waves it creates on the river.
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May 22: Peak discharge

After a week waiting between ice break and ice-jam, looking at the ice’s movement, we eventually managed to sample by boat.
At the same time SPOT 5 was taking a picture of the river…A good thing to calibrate the new research project.
For the dissolved organic matter’s fluorescence we have almost the same value as the one we measured last year at the same period.
We have the feeling to be right at the peak discharge.