Some Views of Antarctica - K4VRC · world with most rapid & extreme climate change, eg. Temperature...
Transcript of Some Views of Antarctica - K4VRC · world with most rapid & extreme climate change, eg. Temperature...
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Some Views of Antarctica
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LAND OF SUPERLATIVES & CHALLANGES
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TUFTS UNIVERSITY NATIONAL SCIENCE
FOUNDATION ANTARCTIC EXPEDITION
1969-1970
Robert L. Nichols - Leader
Geology Student Field assistants:
Robert M. Goodspeed – class of 1960
Roger A. Hart – class of 1962
William G. Meserve – class of 1962
RESEARCH GOALS Include investigating:
PHASE 1 the nature, height and ages of elevated beach ridges along de-
glaciated coastlines to determine the rise of the continental margin and
sea level changes as the ice melted and over what period of time, and
PHASE 2 the glacial geology and volcanic history of the Wright Dry Valley
region.
(Field Assistants’ Assistants – Next Slide)
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Field Assistants’ Friendly Assistants
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1 & 182
3
5
5
5
&
8
67
9
10
1112
13 14 15
16 & 17
4
To Antarctica: From
Quonset, Rhode Island to
( #s 1-6)
#s are stops
along air route:
Destination Antarctica
Home Base
Quonset Navy Base, RI; San Francisco, CA; Oahu, HW; Nadi,
Fiji; Islands; Christchurch, New Zealand; McMurdo, Antarctica;
Sidney, Australia; Darwin, Australia; Bahrain Island; Cairo,
Egypt; Athens, Greece; Naples & Rome, Italy; Paris, France;
London, England; Glasgow, Scotland; Boston, MA
Stage #s - 1 to 5
via MATs; 5 to 6
via US Navy; 7to 8
via Ice Breaker
“Glacier”; 8 to 18
via Commercial Air
Lines
To Boston,
Massachusetts (#s 7-18)
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ANTARCTICA SUPERLATIVES
1. coldest, windiest, driest, cleanest, healthiest and largest desert (averages 2” water equivalent per year) in the
world with most rapid & extreme climate change, eg. Temperature can drop 65 F in 12 minutes
2. no permanent human residents, has no government and is shared by all countries
3. ice sheet is over 3 miles thick (15,700 feet), averages 1.6 miles thick, and holds 70% of the earth’s “fresh
water”, it contains 7, 250,000 cubic miles of ice (90% of world’s total ice)
4. if all ice melted, world ocean levels would rise by 200 to 250 feet
5. the rock surface is pushed by the weight of the ice some 1,625 feet and would v…e…r…y s…l…o…w…l…y
“spring back” over ~ 10,000 years
6. no rain has fallen in the “Dry Valleys” for at least 2 million years (similar to that of the planet Mars)
7. icebergs with surface area 4,250 square miles (size of Connecticut) (subsurface size up to 10 X greater)
8. ocean sea life around Antarctica is the richest in the world
9. lowest ever temperature recorded on earth occurred in Antarctica at minus 129 F
10. sea ice doubles the size of the continent during the winter months, increasing by 40,000 square miles each
day
11. ice cap has 29,000,000 cubic kilometers of ice (which is 90% of all the fresh water ice on the planet) with only
~ 0.4 % of Antarctica ice-free
12. earth’s largest Ozone Hole reaches a maximum area of ~ 27, 000,000 square kilometers during winter
13. ice cap is home to the least number of species and smallest number of native wildlife individuals of any
continent
14. six months daylight & six months darkness
15. Kadabatic winds at the continental edges blow up to ~ 190 mph
16. dry valleys have had no rain in thousands of years and the longest river in Antarctica is the Onyx River In
Wright Dry Valley which = 12 miles long
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One Of Our Earliest Views Of The Antarctic Ice Cap
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Antarctic Ice Cap Surface With A Summer Melt Water Stream
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Close-Up Of Ice Cap Surface “Sastrugy” Caused By Extreme Winds
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Size Comparison Of USA And Antarctica Without It’s Surrounding Sea Ice
Sea Ice Is Shown In The Next Slide
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Continent Doubles In Size During The Winter Months
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All 7 Continents Have Changed Location Through Time.
Watch The White Area Migrate Over Earth’s Surface Through Time
How Do We Know This?How Do We Know This?
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McMurdo Station With Western Antarctica Across The Sea Ice
Continent
Ross Island
Sea Ice
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Williams Air Field At McMurdo, Antarctica (on sea ice) With Active
Volcano In The Background
Mt. Erebus
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Where The Hell Are We Anyway?
It’s Not Exactly The Center Of Civilization
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Maybe This Will Help A Little, Well Maybe Not
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Now That We Know Where We Are, What Is It Like Here?
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= Our Field Season Months
Months
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Earth’s Lowest Ever Recorded Temperature
Vostok, Antarctica In 1983 = Minus 129 Degrees F
Minus 129 F
= Our Location
Operation “Deep Freeze”
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McMurdo Station From The Air
Our Temporary Home When Not In The Field
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Ross Island’s Smoking Gun
Summit = 13,350 feet
Antarctica’s Largest “City” = McMurdo is
Located In Volcano’s Back Yard
Mt. Erebus
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Quonset Hut: Our Quarters While In McMurdo Station On Ross Island
Few miles from the active
volcano
Early Summer Conditions
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What The Well-Dressed Antarctic Explorer Wears -
Most All Of It At Any Given Time
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Outline Of Our
Expedition Study Area
= Goodspeed Glacier
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S.L.
Cross-Section Of West And East Antarctic Ice Sheets
Much of the rock crust lies well below sea level as the result of
the weight of miles of overlying Ice.
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Most of The Bed Rock - Ice
Interface Lies Far Below S.L.
What Antarctica Would Look Like If All the Ice Were To Melt
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Part Of Phase 1 Work
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Trans-Antarctic Mountain Range Dividing East and West Antarctica
Environmental Conditions Of Coastlines Where We Were Working
During The First Phase Of Our Expedition
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Camping on the Sea Ice – 6 to 14 feet thick, We hoped!
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What It’s Like To Go Camping On Sea
Ice During The Antarctic Summer
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Sledging – Note Our Power Source!
This Is How We Traveled During Phase I
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Man-Haul Sledging – Up Close & Personal
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Very Smooth Blue Ice Creates Ideal Sledging Conditions
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Some Rough Sea Ice Conditions For Sledging & Camping
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Example Of Sea Ice Camping Conditions – Phase 1
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Another One Of Our Camp Sites On The Sea Ice
You Don’t See Any Dogs. Do Ya?
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BillMe Roger
Dr. Nichols
Our Home on the Sea IceStaged Group Photo
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ANGR-9 Radio
Operating Frequencies:
Primary = 6835 kcs (voice) Rcv
= 3.74;
Secondary = 6708 kcs (voice)
Rcv = 2.705, &
Emergency = 9001 kcs (voice
& CW) Rcv = 18.17
’59 – ’60 Call Names: “Man-Haul Traverse” = generate – 03 (NGD-03) = Us;
NAF McMurdo = McMurdo Radio (NGD); Hallet Station = Alameda (NIC); Marble
Point = Marble Point Radio; Victoria Land Traverse = Generate Zero One (NGD
– 01)
McMurdo Ham Radio Station = KC4USV = Present Day
Our Sole Means Of Communicating With Anyone Outside Our
Party While In The Field
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The key work here is “normal”
Not exactly our working conditions!
“Normal” Field Setup For “ANGRY 9” Radio
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How’s this for our 73+ pound
“hand-held,” not counting the
tripod-generator, antenna, &
accessories?
We Had To Sledge & Back Pack This Monster “Radio”
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Elevated Beach Ridges At One Of Our Phase One Work Sites
Mt. Erebus: active volcano 13,350 ft high
Large ice bergs in sea ice
Elevated beach ridges
Ice Berg
This Ain’t Your Typical Sandy Beach Material
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Our Fresh Water Source
During Phase I
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Hugh Ice Bergs Frozen In Sea Ice
Note: Human for scale
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We didn’t have it even this good!!! We Need A Windbreak. Where is
the nearest ice berg or large rock?
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Elevated Beach Ridges
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Attack Of The Skuas
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How High Is The Glacier Barrier?
How Far Is It To The Front Of The Glacier?
Who Is That Strange Person?
Who Cares?
What Does This All Mean?
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Inside A Glacier’s Melt Water
Cave – Looking Seaward
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A Couple Of Our Friendly Natives Kissing On Sea Ice
Waddell Seal Pup is Only Few Days Old
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Single Engine Canadian “Otter”
Plane That Transported Us Back & Forth
Between McMurdo & Marble Point
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Our Radio “Communications” While Doing Field Work
Modern-Day McMurdo Station QSL Card
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Ham Shack & Antennas At McMurdo Long After We Were There
(Not Exactly Up-To-Date By Today’s Standards)
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Much Later Photo of McMurdo Ham Shack & Antenna
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A Much More Recent Communications Building At
McMurdo Station
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McMurdo Station Communication Building
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Couple of Recent Hams At McMurdo –
long after we left
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Ham Shack – Long After We Left
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McMurdo Ham Antenna – erected long after we left
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It Sure Wasn’t Like This When I Was There!
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Environmental Conditions Of Dry Valleys Where We Worked During
The Second Phase Of Our Expedition
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One Of Our Field Camps In Wright Dry Valley
Our Auspicious Leader = Doc
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No More Sledging! It’s Now Hiking & Back Packing
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How’s This For A Coffee Break Location?
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Petrified Seal In Wright Dry Valley: 4,500 to 5,000 Years Old
As Age-Dated Back In The States. Yum – Yum !!
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Adelie Penguin In Wright Dry Valley About 20 Miles Inland From The
Sea Ice. This Critter Was Alive!
My shadow
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Is It Animal, Vegetable, or Mineral?
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Who's That Handsome Fellow?
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Digging A Hole For Blasting.
Here’s Where I Learned The True Meaning Of “F.U.B.A.R.”
Note The Patch
Roger
Bill
Doc
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Geologist Hard At Work!
Doc
Bill Roger
Me? I’m Taking the picture, stupid.
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Blow up to 190 mph
during the winter
months
Dry Valley & Coastal Area Common Winter Wind Conditions
Ice Cap
Summer Winds Are Commonly 40+ mph
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“Hoodoo”
Rock
This Is One Example Of What 190 MPH Wind-Blown Sand Can Do To
Solid Rock. These Are Common In The Dry Valleys.
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Typical Dry Valley Surface Material Deposited By Glaciers
It’s About The Same Size And Shape As The Materials Composing
Elevated Beach Ridges
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Doc Bill
Roger
Guess who took this photo
Wright Glacier –Landward Edge
Wright Lake (Frozen)
We Ice-Cored This Lake
Field Geologists Hard At Work
Sea Ice
Ice Cap
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Aerial View Of Glaciers In Wright Dry Valley, Antarctica Named
After Dr. Nichol’s ’59 - ’60 Field Assistants ( sorry, field
assistants’ assistants weren’t included)
“Bob’s 15-Minutes of Fame”
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Aerial Photograph Of
Goodspeed Glacier
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Goodspeed Glacier
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Goodspeed Glacier
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Onyx River = Longest River In
Antarctica - 12 miles long
Bob’s Glacier Terminus
Person For Scale
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Terminus of Goodspeed Glacier
Person For Scale
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Crazy Geologists Doing Field Work In Near- Surface
“Whiteout” Conditions
Part Of Depth To Permafrost Study: Phase 2
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Our Mode Of Transportation Back
To Christchurch, New Zealand
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AGB – 4 USS “Glacier” Ice Breaker - I took this photo
from one of the ship’s helicopters just before we landed
on it’s helo-deck as it was moving toward New Zealand
Our Expedition Field Season Ends & It’s Time To Head Home
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USS “Glacier’s” Helicopter On Helo-Pad: It flew us
from our camp at Marble Point onto the ice breaker
for our trip back to New Zealand
Ya, I know. I must have scanned my Kodochrome slide ”basackwards”
What’s This?
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USS “Glacier” Breaking Sea Ice In The Ross
Sea As It Begins Its Journey To New Zealand
Seal on sea ice
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Penguins Waving Goodbye & Taking Pictures
Of Us As We Head North
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Open Water Ahead – Ross Ice Shelf Margin & Ice Berg
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Hey! In case you’re wondering, this isn’t Antarctica!
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My Home In The Woods – Winter
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My Home In The Woods – Summer
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Many, Many Years Later. I Guess I Haven’t Learn Very Much Over The Years!