1. Climate and Physics
Lisette de Severpont Domis, Luke Winslow, Justin Brookes, John Lenters, Murray Mackay, Robyn Smyth, Alice Parkes, Bruce Hargreaves, Christina Maki, Taylor Leach, Lesley Knoll, Bill Renwick, Jasmine Saros, Catherine O’Reilly, Jorge O’Kunijhttons, Dominic Vachon, Hillary April Smith, Lisa Doner, Maria Cintia Piccolo, Lars Rubstam, Nihar Samal, Eleanor Jennings, Don Pierson, Susan Hendricks, Guangwei Zhu, Kristin Strock, Jenny Brentrup, Amy Hetherington, Lucy Crockford, Jen Klug, Brittany Potter.

2. Projects Completed In progress New Lake Analyzer
Physical limnology of 25 instrumented lakes
Wind shear vs convection
New
LAS
Episodic events

3. Episodic events Eleanor: paper accepted in Freshwater Biology
High frequency data to describe events
Few examples of biological impacts/responses
Ongoing signal processing project
Link variability in physical data to bio
What is a disturbance?
Lake Analyzer paper: doi: /j.envsoft

4. Lakes and Climate Skew towards temperate lakes
Precip/flow dominated systems?
Flushing vs mixing
Episodic events
Qualifying disturbance
Integrating model space
Process based models
Hypothesis testing (stratification, ice cover duration, extreme events)
Defining “extreme”
Response based? Statistical?
An episodic event is an event which causes significant change in phys/bio relative to background
Shifts in run-off patterns/timing
Early season shifts (ice-off) – event trigger
Sensor deployment?
Ice phenology
Spring flush
Biological feedbacks/dependence on time to stratification
See L. Arvola, Williamson (alpine mobile buoys)

5. Scaling up to continental/global scales
Ice-cover, change, modeling?
Global lake water temperature trends
In situ data
Satellite images
Workshop late spring/early summer 2012
How are lakes changing?
What are the major controls?
Surface temps
Profiled temperatures

6. Applying lake distributions to physical limnology
Response to change
Moving away from individual basis
Model space – lake context/sensitivity/driver response
Coherence
Synchrony in response to change (see D. Livingstone)
Volume vs carbon, integration

7. GROUPS Early spring (Robyn) Episodic events (Eleanor/Don)
What is an episodic event? Stratification. Phenology oh stratification
Wind shear vs convection (Jordan)
Influence of size and shape/orientation on convective importance to gas exchange
Lakes as Sentinels (Craig)
Global lakes coherence/distribution/spatial scale (Luke)
The number of lakes and their distribution around the world is not fixed. We now have the ability to directly count and identify lakes aggregated to the yearly scale.

8. Convection vs wind shear
Gas exchange driven by surface layer turbulence
Wind shear
Penetrative convection
Most exchange models driven by wind
Ongoing work, see G13 poster…
Exploring model space
Gas exchange (topic 1)
Surface mixing (topic 2)?

9. Lake evaporation/buoy uses
How many lakes can we use?
42 lakes with Energy Budget variables measured
What is needed on a buoy?
What defines a GLEON buoy…?