Replacement vessel for AAD icebreaker Aurora Australis not value for money, says audit office. What would you expect – most everything Govt touches turns to crap.
Their warm May continues – Harsh weather traps 34 in Southland, Crown Range closed 23 May 2016 – earlier posts following – Unseasonally warm weather likely to stick around
I am sure Australian taxpayers hearts will be gladdened. – Scientists witness extraordinary feeding event as humpback whales feast on krill ‘super-swarm’ and
Rare krill ‘super-swarm’ a voyage highlight
The AAD reported this research in October 2015 – Adélie penguin population almost doubles in East Antarctica. The SMH has just reported – Giant iceberg could wipe out Adélie penguin colony at Cape Denison, Antarctica
The link is here Modulation of Ice Ages via Precession and Dust-Albedo Feedbacks.
His earlier paper was discussed – Albedo regulation of Ice Ages, with no CO2 feedbacks. And on a related subject I posted – Some climate sanity after Paris COP21 blabfest – drawing attention to The book “The Chilling Stars” by Henrik Svensmark & Nigel Calder sums up 12,000 years of Holocene cosmic & solar driven “climate change” in the North Atlantic. Ralph tells me he is in touch with Henrik Svensmark.
We present here a simple and novel proposal for the modulation and rhythm of ice ages and interglacials during the late Pleistocene. While the standard Milankovitch-precession theory fails to explain the long intervals between interglacials, these can be accounted for by a novel forcing and feedback system involving CO2, dust and albedo. During the glacial period, the high albedo of the northern ice sheets drives down global temperatures and CO2 concentrations, despite subsequent precessional forcing maxima. Over the following millennia CO2 is sequestered in the oceans and atmospheric concentrations eventually reach a critical minima of about 200 ppm, which causes a die-back of temperate and boreal forests and grasslands, especially at high altitude. The ensuing soil erosion generates dust storms, resulting in increased dust deposition and lower albedo on the northern ice sheets. As northern hemisphere insolation increases during the next Milankovitch cycle, the dust-laden ice-sheets absorb considerably more insolation and undergo rapid melting, which forces the climate into an interglacial period. The proposed mechanism is simple, robust, and comprehensive in its scope, and its key elements are well supported by empirical evidence.
This Fig 3 from the book The Chilling Stars by Henrik Svensmark & Nigel Calder sums up 12,000 years of Holocene cosmic & solar driven “climate change” in the North Atlantic. The paper by G. Bond can be found as a pdf by googling the title -Persistent solar influence on North Atlantic climate during the holocene. The periods of iceberg armadas through the last glacial are termed Heinrich events and the warmer periods between are termed Dansgaard-Oeschger events. I wonder if these 19C reports of iceberg fleets way north of where we would now expect in southern oceans – are the tail end of the last Heinrich event.
Guest article by Ralph Ellis who welcomes constructive feedback – some familiar ice ages charts put together in a way I have not seen.