tuesday february 12, 2013
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Tuesday February 12, 2013. ( Introduction to Oceanography; Salinity; Video – Oceans Part1 ). The Launch Pad Tuesday, 2/12/13. Complete the following sentence: We know more about the surface of the planet Mars than we know about ___________________. what’s in our own oceans. Announcements. - PowerPoint PPT PresentationTRANSCRIPT
TuesdayFebruary 12, 2013
(Introduction to Oceanography; Salinity; Video – Oceans Part1)
The Launch PadTuesday, 2/12/13
Complete the following sentence:
We know more about the surface of
the planet Mars than we know about
___________________.what’s in our own
oceans
Announcement
sHappy Birthday to President Lincoln!
AnnouncementsI will be available after
school from 4:45 until 5:15.
Assignment Currently Open
Summative or
Formative?Date Issued Date Due Date Into
GradeSpeed Final Day
Quiz 17 S2 2/1 2/1 2/1 FRIDAY
WS – Metamorphic
RocksF11 2/6 2/8 FRIDAY
Lab – Metamorphic
RocksF12 2/7 2/9 FRIDAY
Quiz 18 S3 2/8 2/8 2/11 2/25
Lab – Mixed Rocks F13 2/11 2/12 FRIDAY
Recent Events in ScienceLDCM Launched
Read All About It!www.nasa.gov/mission_pages/landsat/main/index.html
The Landsat Data Continuity Mission (LDCM) spacecraft is in orbit following a picture-perfect launch aboard a United Launch Alliance
Atlas V rocket yesterday. The Atlas V booster performed normally and the Centaur upper stage engine ignited as planned. The payload fairing that protected LDCM during the first part of ascent separated on time
and fell away, revealing the spacecraft. The Centaur's engine shut down to begin a 55-minute coast phase before it reignited to put LDCM into
its orbit above Earth.The Landsat Data Continuity Mission (LDCM), a collaboration between NASA and the U.S. Geological Survey, will provide moderate-resolution (15 m–100 m, depending on spectral frequency) measurements of the Earth's terrestrial and polar regions in the visible, near-infrared, short wave infrared, and thermal infrared. LDCM will provide continuity with
the 38-year long Landsat land imaging data set. In addition to widespread routine use for land use planning and monitoring on
regional to local scales, support of disaster response and evaluations, and water use monitoring, LDCM measurements directly serve NASA
research in the focus areas of climate, carbon cycle, ecosystems, water cycle, biogeochemistry, and Earth surface/interior.
Oceanography
Oceanography in the sense that we will study it should probably be titled “The
Hydrosphere”, because we will also study fresh water.
The Composition of SeawaterSeawater consists of about 3.5% (by weight) dissolved
minerals.Salinity refers to the total amount of solid material
dissolved in water.Salinity is typically expressed in parts per thousand (‰)
The average salinity of seawater is 35‰, with the
major constituent being sodium chloride
The Composition of SeawaterSources of Sea Salts chemical weathering
of rocks on the continents and
subsequent inflow from rivers
outgassing from volcanic eruptions
The Composition of SeawaterProcesses Affecting Seawater
Salinity
Variations in salinity are a consequence of changes in the water content of the solution.
Processes that decrease salinity (add water) include:
precipitation
runoff from land
icebergs melting
sea ice melting
The Composition of SeawaterProcesses Affecting Seawater
Salinity
Variations in salinity are a consequence of changes in the water content of the solution.
Processes that increase salinity (remove water) include:
evaporation
formation of sea ice
The Composition of SeawaterSurface salinity in the open ocean ranges from
33‰ to 38‰.
Processes Affecting Seawater Salinity
increase seawater salinity
decrease seawater salinity
A desalination plant that removes salts and other chemicals from sea water to produce fresh water.
Video
DisneyNatureOceans(Part 1)