Two days before breakup:
Plots below assume AST throughout the record.
A large drop this year (earlier breakup) but is within the bounds of noise in this very noisy system. It does follow the downward trend from the 1970s.
Showing posts with label Tanana. Show all posts
Showing posts with label Tanana. Show all posts
2019/04/15
2019 Nenana - River Ice breakup
The Nenana Ice Classic for 2019 ended when the Tanana river ice broke up on 14th April 2019 at 12:21 AM.
Two days before breakup:
Plots below assume AST throughout the record.
A large drop this year (earlier breakup) but is within the bounds of noise in this very noisy system. It does follow the downward trend from the 1970s.
Two days before breakup:
Plots below assume AST throughout the record.
A large drop this year (earlier breakup) but is within the bounds of noise in this very noisy system. It does follow the downward trend from the 1970s.
2017/05/05
Nenana Ice Classic is over for 2017
The Nenana Ice classic is a non-profit corporation formed
by the residents of Nenana, Alaska, for the purpose of
conducting an annual ice pool contest under special
statutory authority enacted the first state legislature in 1960.
The Association was incorporated by the State of Alaska in
December 1972. Previously it had operated as an
unincorporated association.
The idea is to guess the exact time of the ice break-up on the nenana river
This contest has been running since 1917 and consequently gives an idea of thermal conditions on the river over time. Unless dynamite is used(!) the time of breakup is difficult to contest and calling "Fraud" even more contentious.
Three plots are given 2 timed from the start of the year and one from the vernal equinox (the latter uses a fixed point in solar time).
Looks like the break up occurred at a time predicted by the slope of the average
The idea is to guess the exact time of the ice break-up on the nenana river
This contest has been running since 1917 and consequently gives an idea of thermal conditions on the river over time. Unless dynamite is used(!) the time of breakup is difficult to contest and calling "Fraud" even more contentious.
Three plots are given 2 timed from the start of the year and one from the vernal equinox (the latter uses a fixed point in solar time).
Looks like the break up occurred at a time predicted by the slope of the average
2016/04/25
Nenana Ice Break Up Occurred 2016-04-24 15:39:00
The Annual Nenana Ice Classic is Over for Another Year
this one timed from vernal equinox
Still declining!
The Tanana River officially broke up on 2016-04-24 at 15:39:00
http://www.nenanaakiceclassic.com/
2 plots as usual
one timed from start of year
2 plots as usual
one timed from start of year
this one timed from vernal equinox
Still declining!
2015/04/25
The Annual Nenana Ice Classic is Over for Another Year
After an initial movement 2 days ago an ice-jam prevented full movement of the tripod and the clock was not stopped. However, the Tanana River officially broke up on April 24th at 2:25 P.M. Alaska Standard Time.
http://www.nenanaakiceclassic.com/
Tripod moved but not moving
Not free of ice but no more tripod:
So how does this extended date fit in with previous data.
2 plots
one timed from start of year
this one timed from vernal equinox
Seems to be following a declining period with a few early peaks
http://www.nenanaakiceclassic.com/
Tripod moved but not moving
Not free of ice but no more tripod:
So how does this extended date fit in with previous data.
2 plots
one timed from start of year
this one timed from vernal equinox
Seems to be following a declining period with a few early peaks
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