Archive for March, 2011

All the Pretty Colors…

Wednesday, March 30th, 2011

Just a CODAR graph from March 9th, 2011.  I picked this one because it is very interesting to see the speeds of the currents mixed together for once.

With the other graphs, I saw that there was a great deal of warm colored arrows towards the northern and southern regions, with the cool colored arrows being concentrated in the middle.

With this graph, I noticed that they were mixed instead of being in their typical, expected areas, which interested me and made me pick this particular CODAR graph.

-Bronson George

Enter title here

Wednesday, March 30th, 2011

This is an image of Chlorophyll composition off the shores of New Jersey on March 29, 2011  at 20:13 GMT. This picture shows a large spike of chlorophyll towards the southern end of New Jersey.

This is an image of the currents at the same time, date and location as the previous picture. At the location of the large chlorophyll composition, the currents are moving south/southwest at 20 cm/sec

This shows the sea surface temperature 3 hours later, 23:14 GMT , at the same spot. Although most of the chlorophyll is farther south than the picture shows, it can be seen that the location around is 43F

This picture shows the same spot at 18:50 GMT which is approximately 1 hour prior to the first two pictures. This shows a minute  increase in temperature in comparison to the picture taken at 23:14 GMT which is to be expected since it is later in the day

Chris Gillotte

Law of the sea for the AUV

Wednesday, March 30th, 2011

For this week to describe what law's we must abide by while flying our new glider from Iceland to the Canaries(via Greenland), we first want to define the EEZ.  The Exclusive Economic Zone is the area off the coast of a country to which they have special rights over the exploration and use of the marine resources that are within these defined boundaries.  These boundaries are defined as being 200 nautical miles from the countries land.(shown in the google map figure below)

From our estimated flight path, we are expecting to possibly come close to the eez's of  Iceland(which we are launching from), Greenland(where we are checking out the sights for the moorings), The Azores, the Canaries and possibly Canada if we are need of any assistance.

We found a document that describes some laws on the use of AUV's in international waters called "Legal Status of Autonomous Underwater Vehicles" by Stephanie Showalter from the National Seagrant Law Center.  It states that:

No legal framework currently exists to
regulate the use of AUVs. Permits and licenses are only required in a few narrow circumstances. While there is no indication that
the oceans are in danger of being overrun
by AUVs, their growing availability and
popularity warrant investigation into the
potential regulatory implications of the
widespread use of AUVs. This commentary
examines the current legal status of AUVs
under U.S. law and suggests that a permitting regime may already exist.

A vessel “includes every description of
watercraft or other artificial contrivance used,
or capable of being used, as a means of transportation on water.” (1 U.S.C. § 3). The “vessel” test is simple: is the structure “fairly engaged in or suitable for, commerce or navigation and as a means of transportation on
water?” (Hitner Sons Co. v. U.S., 13 Ct. Cust.
216, 222 (1922)). For a boat, barge, or other
floating structure to be considered a vessel,
“it must have some relation to commerce or
navigation, or at least some connection with
a vessel employed in trade.”

John, Connor, Sarah, Rachel, Nilsen

Way-hey-hey Points!

Wednesday, March 30th, 2011

Since we don't have any official route yet, we created a rough estimate of our glider's path from Iceland to Greenland, and then to the Canary Islands. Once we have an official route that the glider will be taking, we will determine which distances we will travel before we turn the glider around or revert it to other regions.There is a greater risk of reverting the glider up North than if we were to do this in the South, due to water temperature's affect on the glider's battery. We also have to consider the north Atlantic Gyre because the current moves clockwise, and it's more plausible that after we pass the Mid-Atlantic Ridge, the glider would be more directed to Europe.

Life of the Trip!

Wednesday, March 30th, 2011
Here are some awesome facts that we pulled together about RU25's battery life and logistics:

"Power Budget: ru25d '10-11 Palmer Season Deployment 1: 51 AH at 12.7 V, 12.7 V extrapolated at 57.6% battery life using history of curves total AH = 89 ru25d '09-10 Palmer Season Deployment: 86 AH @ 12.2 V, 12.2 V extrapolated at 71% using battery life curves total AH = 121 (high because we drifted) ru16 NJDEP: 116 AH @ 12.05 V ==> 140 AH total estimated Theoretical (from Duracell): 5.65 AH * 23 = 130 AH
Temperature effect (from Duracell): 21 C --> 0 C = 71% 21 C --> -10 C = 50% ~ 2.1% per deg C ==> ~ 70 % for ru25d
135 AH average (theoretical vs '10-11 deployment 1)
135 AH 8 .7 = 94.5 AH lets say 92 AH because we don't know what was used in lab
edit- updated the theoretical number by 5% due to ru25d burning less battery. Overall change is small, < 2 ah.

ALSO HERE IS SOME TEMPERATURE DATA:

So this data is from march of this year, so this is really just to show that we have found a website to get the data from.

I chose seven points between Iceland and the Canary Islands.  The data from the first float, closest to Iceland only goes to 419m, possibly because this is as deep as it gets.  We have not checked the bathymetry.  The temperature here is almost uniformly 7 degrees throughout the profile.

Further south, there are several defined thermoclines, at about 30-50m and again at 180-220m depth.  The surface temperatures range from 7 - 18.5 degrees throughout the path.  Temperatures at 1000m depth range from 7-12 degrees.

Our next mission is to acquire the appropriate temperature data for the time of year that it will be flying, and to relate the temperature to the battery life.

Happy Birthday to Me

Wednesday, March 30th, 2011

Temperature January 8, 2011

Currents January 8, 2011

-Casey Wagner

Mega Chlorophyll

Wednesday, March 30th, 2011

Chlorophyll on March 26th

The above image is the amount of chlorophyll along the northeastern coast on March 26, 2011. This image caught my eye because of the huge increase in the amount of chlorophyll along the edges of the land, as opposed to farther into the ocean. From what I've learned in class, chlorophyll are just little organisms that use products in the water to grow etc, and from this image, I'm imagining that there is a huge amount along the land because perhaps they are utilizing chemicals from industrial run off to grow? f this is the case, this saddens me because it's not a nature occurrence but good I suppose because more chlorophyll is more oxygen for us.

-Oliver Ho

Gotta Get Down on Friday

Wednesday, March 30th, 2011

Codar with SST overlay. 3-29-11 21:00

-Collin Dobson

Oh Ship!

Wednesday, March 30th, 2011

When flying the glider from Iceland to the Canary Islands, we need to look at the shipping ands that the glider may encounter.  Even though the glider flies underwater, it needs to come up about every 8 hours to call into the COOL room.  If it hits a ship, it is the end of the mission. Below are the shipping lanes for the Canary Islands.

Shipping Lanes for Canary Islands

Shipping Lanes Between Africa and the Canary Islands

Shipping Lanes off the Coast of Spain

The above three pictures are the major shipping lanes that the glider could possibly encounter on its mission.  There is a high volume of traffic off the coast of spain as well as the waterway between the Canary Islands and Africa.

Emily, Dave, Mario, Drew

Whether we go or not depends on the weather!

Wednesday, March 30th, 2011

Iceland is at 65 degrees North latitude and 18 degrees West longitude, located in the Subarctic of the Severe Mid-latitude. The current temperature as of 10:18 P.M March 29th is 39 degrees with a wind chill of 32. The best weather in Reykjavik (capital of Iceland) falls between June and August, when temperatures can reach 13°C / 55°F to 20°C / 68°F. Average temperatures in Iceland in April range from .4-5.7°C, (32-42°F). Snowstorms are still common, but as the month goes on days tend to become warmer, drier, and longer. The average sunrise in April is 5:37am, with sunset around 8:38pm.

Sample weather forecast from Monday: East 5 to 10 m/s by the north and east coast in the evening, elsewhere lighter wind. Light sleet or snow in the eastern part, occasional rain- or sleetshowers in the west. East and southeast 3 to 10 tomorrow. Sleet or snow and later rain in places in the southeast and east parts, elsewhere mostly dry. Widely frost tonight, but temperature 2 to 8 deg. C, tomorrow afternoon.

http://en.vedur.is/ - Icelandic Meteorological Office. Some available data categories: cloud cover, detailed wind data, shipping forecasts (wind)

http://www.buoyweather.com/wxnav6.jsp?region=iceland&program=Maps - restricts data for free, may be helpful

Wind 3-28-11

Wind 3-28-11 18:00

For a more general and historic diagram of wind patterns and climate:

Atlantic Wind Forecast, as of 4-1-11

Monthly Average Temperatures

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
mm 86.2 74.8 75.9 56.4 42.3 44.6 50.8 61.7 70.9 87.8 82.7 84.0 817.6
inches 3.4 2.9 3.0 2.2 1.7 1.8 2.0 2.4 2.8 3.5 3.3 3.3 32.2

For Average Percipitation/Rainfall

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Surface accumulated precipitation in the previous three hours

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500 hPa Geopotential map, 540 Dm thickness and SLP

Found at:

http://www.meteoexploration.com/maproom/gfsmaps.html

Ben, Jason, & Anthony