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Troy Lake Michigan
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2013
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Blue Heron
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Project Title: |
Dispersion and mixing caused by near-inertial internal waves in Lake Michigan |
Project Status: |
Submitted |
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Principal Investigator: |
Cary Troy, Purdue |
Project Institution: |
Purdue |
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Project ID: |
103597 |
Version #: |
2 |
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Date Submitted: |
8/24/2012 4:58:00 PM |
Created By: |
Cary Troy |
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Date Last Modified: |
8/27/2012 9:55:00 AM |
URI Serial #: |
None |
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Funding Agencies: |
NSF/OCE/EDU - OCE-1030842 - Funded |
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Summary of Field Work: |
We are examining near-surface vertical mixing and horizontal dispersion in the middle of Lake Michigan, and are seeking a 1 week cruise in summer of 2012 (preferably late July, when winds are relatively weak but thermal stratification is strong). We would like to perform repeated microstructure profiling in the middle of Lake Michigan's southern basin, remaining on station for the duration of the cruise. The microstructure profiler will be a free-falling (tethered) profiler that will need to be launched by hand from the deck of either the primary ship or an auxiliary, smaller inflatable. We would also like to perform ship-based ADCP measurements during the entire cruise. At the beginning of the cruise, we plan to release a dye patch, and this patch will then be tracked. |
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Summary of Facility Requirements: |
We require a vessel that ideally has:
- ability to remain on station (mid-lake Lake Michigan) for the duration of the 1 week cruise.
- Acoustic Doppler Current Profiler (ADCP) or capabilities to obtain velocity profiles under vessel for duration of cruise
- Simple winches for CTD and microstructure profiling
- Potentially the ability to utilize a smaller inflatable boat (can be tethered behind vessel) to allow for hand-lowering of the thermal microstructure instrument. |
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Summary of other requirements and comments: |
We have been given approval from the Physical Oceanography Program of the National Science Foundation (Ocean Sciences Division) for this cruise, even though it was not originally budgeted in the original proposal. Funds to cover ship costs will be transferred from the Purdue University project account to the vessel. |
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Type of Request: |
Primary Ship Use |
Request Status: |
Submitted |
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Request ID: |
1005715 |
Created By: |
Cary Troy |
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Date Last Modified: |
8/27/2012 9:55:00 AM |
Date Submitted: |
8/24/2012 4:58:00 PM |
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Year: |
2013
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Ship/Facility: |
Blue Heron
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Optimum Start Date:
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7/14/2013 |
Dates to Avoid: |
We are seeking a time with relatively calm winds and strong stratification. In June, the thermal stratification is not yet strong enough; as we get further into August, the wind gets stronger, to the point where surface waves dominate the mixing dynamics near the lake surface. |
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Earliest Start Date: |
7/1/2012 |
Multi-Ship Op: |
No |
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Latest Start Date: |
8/6/2012 |
Other Ship(s): |
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Operating Days Needed: |
Science Days |
Mob Days |
De-Mob Days |
Estimated Transit Days |
Total Days |
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7 |
1 |
1 |
2 |
11 |
Repeating Cruise?
(within same year) |
No |
Interval: |
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# of Cruises: |
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Description of Repeating cruise requirements: |
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Justification/Explanation for ship choice, dates,
conflicts, number of days & multi-ship operations: |
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Short Description of Op Area
for use in schedules: |
South Lake Mich |
| Description of Op Area: |
The center of Lake Michigan's southern basin. |
| Op Area Size/Dia.: |
10miles, estimated |
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Lat/Long |
Marsden Grid |
Navy Op Area |
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Beginning
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42.696° N
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87.021° W
map
42° 41.76' N
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87° 1.26' W
map
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Ending
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42.696° N
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87.021° W
map
42° 41.76' N
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87° 1.26' W
map
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Show Degrees Minutes |
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Foreign Clearance Required? |
No |
Coastal States:
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 Important Info on Foreign Research Clearances
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Are you or any member in your science party bringing in any science equipment items which are regulated for export by the International Traffic in Arms Regulations (ITAR) and/or the Export Administration Regulations (EAR)?
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No |
If yes, have you applied for the necessary permits through your export control office?
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No |
| Questions about ITAR/EAR regulations?
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Comments about foreign clearance requirements or
description of any other special permitting requirements
(e.g., MMPA, ESA, IHA, Marine Sanctuaries, etc.) |
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Requested Start Port |
Intermediate Port(s) |
Requested End Port |
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None |
None |
None |
Explanation/justification for requested
ports and dates of intermediate stops
or to list additional port stops |
There are no ports that can be selected for Lake Michigan - we are willing to board the Blue Heron wherever makes the most sense given the logistics. Milwaukee is the closest large port to the desired cruise location. |
Important Info on Working in Foreign Ports
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Chief Scientist: |
Cary Troy, Purdue |
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# in Science Party |
10 |
# of different science teams |
1 |
# Marine Technicians to be
provided by ship operator:
(include in science party total)
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1 |
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Explanation of Science Party Requirements and Technician Requirements |
The science party at present includes PI (C. Troy), graduate students, and undergraduate students from Purdue University and other schools. 2 other senior scientists may accompany us on the cruise, pending their availability. |
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 Dynamic Positioning | ADCP | Multibeam | Seismic |
| Dredging/Coring/Large Dia. Trawl Wire | Stern A-frame | Fiber Optic (.681) | 0.680 Coax Wire |
| SCUBA Diving | Radioisotope use - briefly describe | NO Radioisotope use/Natural level work | Other Operator Provided Inst. - Describe |
| 0 PI-Provided Vans - briefly describe | MOCNESS | | |
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Explain Instrumentation or Capability
requirements that could affect choice
of ship in scheduling. |
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Explain Major Ancillary Facilities
Requirements and list description
and provider for "other" systems. |
We would like to use a ship-mounted ADCP to measure currents below the vessel while on station. |
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