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IWTG EIWS > METOC > Flashcards

METOC Flashcards

1
Q

How does Naval Oceanography support the Information Dominance Mission?

A

They develop and deliver dominant information capabilities in support of U.S. Navy, Joint and national warfighting requirements

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2
Q

What are the types of METOC products available through Navy Oceanography portal- oceanography webpage?

A
  • U.S. Naval Observatory (USNO)
  • Joint Typhoon Warning Center (JTWC)
  • Naval Oceanography Operations Command (NOOC)
  • Fleet Numerical Meteorology and Oceanography Center (FNMOC)
  • Naval Oceanographic Office (NAVO)
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3
Q

Joint Typhoon Warning Center (JTWC)

A

Agency responsible for issuing tropical cyclone warnings for Pacific and Indian Oceans

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4
Q

Fleet Numerical Meteorology and Oceanography Center (FNMOC)

A

Provides highest quality, most relevant and timely worldwide meteorology. Operations Center is in Monterey California.

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5
Q

Naval Oceanographic Office (NAVO)

A

Maximizes seapower by applying relevant oceanographic knowledge in support of U.S. Natioanl Security.

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6
Q

Wind Direction

A

Average direction from which the wind is blowing during a specified period.

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7
Q

Wind Speed

A

Avreage rate of air motion, or the distance air moves in a specified unit of time.

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8
Q

Ambient air

A

Reflects the amount of heat present in the air.

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9
Q

Wind Chill

A

Temperature required under no-wind conditions that will equal the cooling effect of the air and the wind on an average sized, nude person in the shade.

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10
Q

Heat Stress

A

Measure of how hot the air feels based on temerature and humidity

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11
Q

Precipitation

A

All forms of moisture that fall to earths surface
Ex: Rain, drizzle, snow, hail.
Observed and classified by form, type, intensity, and character

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12
Q

Relative Humidity

A

Ratio of how much water vapor is in the air, compared to the amount of water vapor air can hold.

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13
Q

Sky Condition

A

Description of the sky or “State-of-the-sky”

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14
Q

Atmospheric pressure

A

Refers to the pressure exerted by the column of air on any point of the earths surface

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15
Q

Air Mass

A

Large volume of air defined by its temperature and water vapor content.

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16
Q

Bathythermograph

A

Measurement and recording of subsurface water temperature at various depths. Normally conducted at 100 fathoms (600ft) or greater.

17
Q

Bioluminescence

A

Plankton organisms are chiefly responsible for bioluminescence of the sea. It is a bluish-green glow in the water.

18
Q

Sea wave

A

Also known as wind waves, generated by the wind in the local area. Light winds produce small wave heights, higher winds produce larger heights.

19
Q

Wave height

A

Vertical distance from crest of a wave to trough. Measured in feet.

20
Q

Wave period

A

Time it takes a complete wave cycle (crest to crest or trough to trough) to pass a given fixed point. Measured in seconds.

21
Q

Swell wave

A

Seas that have moved out and away from the area in which they were formed.

22
Q

Ebb

A

Current that flows away from the shore with a falling tide

23
Q

Flood

A

Current that flows toward the shore as a rising tide.

24
Q

High

A

Sea level rises over several hours, covering the intertidal zone, flood tide. When water hits highest level, it has reached high tide.

25
Q

Low

A

Sea level falls over several hours, revealing intertidal zone, ebb tide. When the water stops falling, it has reached low tide.

26
Q

Three layers within the ocean

A

Mixed Layer
Thermocline
Deep layer

27
Q

Mixed Layer

A

Upper layer. Consists of nearly uniform, warmer temperatures. Extends from surface to about 450 meters

28
Q

Thermocline

A

Center layer. Found at base of mixed layer, marked by rapid decrease of water temp.

29
Q

Deep layer

A

Bottom layer. Characterized by a fairly constant cold temperatures, less then 4 degrees celcius.

30
Q

What three factors effect the transmission of sound in seawater?

A

Temperature- Speed decreases as temperature decreases.
Pressure- Sound increases as depth (pressure) increases
Salinity- Does not effect open ocean due to salinity values being near constant. Higher the salinity, the greater the speed.

31
Q

Effects atmospheric conditions have on electromagnetic radiation.

A

Standard refraction- Change in direction of a wave due to change in speed.
Super-refraction: Bends the beam toward the earth
Sub-refraction: Bends the beam away from earth
Trapping: Similar to ducting.

32
Q

Small Craft Warning

A

Issued in Harbors, inland waters, and coastal OPAREAS. Lower limit of sustained winds speed varies by region.

33
Q

Gale Warning

A

Areas experiencing wind speeds of 35 knots or higher.

34
Q

Storm Warning

A

Areas experiencing wind speeds of 50 knots or higher.

IWTG EIWS (9 decks)

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