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n1vux (1492)

n1vux
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Only started with Perl4 and Perl5 in 1995. I was doing AWK etc for 12 years before that, and resisted switching. I've been doing OO since before C++ hit bigtime, with Objective-C and SmallTalk, so I really like the (no longer new) Perl5 OO style; and the Lispish Map style is also an old friend. What do I hack with Perl? All data that passes my way; systems monitoring scripts at $DayJob, weather data at night, and I cheat on NPR word puzzles. Member: Boston.pm.org [pm.org] BLU.org [blu.org] /. LinkedIn [linkedin.com]

N1VUX is my FCC-issued ham radio callsign.

Journal of n1vux (1492)

Friday April 29, 2005
05:49 PM

Science News

[ #24453 ]
Shorts
Update to Yesterday's Woodpecker discovery
  Part two of the NPR & National Geographic Radio Expedition for the Ivory Billed Woodpecker.
Science Magzine article posted, freely available. (Click PDF in upper right.)
Salty staircase in the atlantic provides clues to ocean mixing
« Layers of salty ocean water mix with layers of fresher water, creating a salty staircase or layering driven by small-scale convection known as salt fingers. Although scientists have known about salt fingers since 1960, when they were discovered at the Woods Hole Oceanographic Institution, they have not understood their role in ocean mixing and the ability of the ocean to absorb heat, carbon dioxide and pollutants from the atmosphere.
   ... Salt fingers form because heat and salt diffuse at vastly different rates, hence the term double diffusion. ... In the ocean, density increases with depth, and in combination with gravity, makes for a generally stable stratification that is difficult to mix vertically. The large-scale circulation system requires that significant vertical mixing occur somewhere in the ocean, but this mixing has been difficult to find and measure. Since oceanic mixing occurs on very small scales, from less than an inch, and on rapid time scales of a few seconds, and climate models only resolve space and time in scales of tens of miles to hours and days, it is a challenge for scientists to resolve ocean mixing rates and improve the climate models. »

This is very odd to those of us more used to discussions of atmosphereic mixing and convective cells which span the troposphere. 

Science Magazine Schmitt et al  and Review  
National Science Foundation [not posted yet]
Woods Hole Oceanographic Institution release  (with pictures & links)
via   EurekAlert item  
Scientists confirm Earth's energy is out of balance
« Scientists have concluded more energy is being absorbed from the sun than is emitted back to space, throwing the Earth's energy "out of balance" and warming the globe. »
« Hansen's team, reporting Thursday in the journal Science, said they also determined that global temperatures will rise 1 degree Fahrenheit this century even if greenhouse gases are capped tomorrow.»
Abstract: « Our climate model, driven mainly by increasing human-made greenhouse gases and aerosols among other forcings, calculates that Earth is now absorbing 0.85 ± 0.15 W/m2 more energy from the Sun than it is emitting to space. This imbalance is confirmed by precise measurements of increasing ocean heat content over the past 10 years. Implications include: (i) expectation of additional global warming of about 0.6°C without further change of atmospheric composition; (ii) confirmation of the climate system's lag in responding to forcings, implying the need for anticipatory actions to avoid any specified level of climate change; and (iii) likelihood of acceleration of ice sheet disintegration and sea level rise. »

- Is this the "Smoking gun" for global warming? One NASA Climatologist says so. This is a model that is making testable statements about reallity today, so this is a step forward.  
Science Magazaine Article NASA/Goddard Space Flight Center--EOS Project Science Office via EurekAlert (and Science Daily)
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