I forbindelse med Murry Salbys brå bortgang tidligere i år gjør vi oppmerksom på hans banebrytende forskning på klimafeltet, og legger etter ønske fra SCC-staben ut tre av hans rapporter for nedlastning. English readers: Please find below Salbys latest papers for download.
Theory of Increasing Greenhouse Gases
Medforfatter Hermann Harde, preprint, PDF nedlastbar her. Her er første to avsnitt fra sammendraget:
Unlike elsewhere on the globe, temperature in the tropics has increased systematically. From observed tropical temperature, numerical simulations have reproduced the observed evolution of atmospheric CO2, including its annual cycle. Much the same has followed empirically from the observed covariance between tropical temperature and net emission of CO2 – the component of emission that actually changes CO2. Intensified over tropical land, the robust coherence between those observed features establishes that the changes of tropical temperature do not follow from changes of CO2, but rather produce them.
Here, we investigate the physical mechanisms through which observed warming in the tropics can produce the observed evolution of CO2. The conservation law governing atmospheric CO2, supported by the observed temperature dependence of surface fluxes and observed temperature in the tropics, is used to calculate the time-varying response of CO2 net emission.
Control of Atmospheric CO2, part 1
Relation of Carbon 14 to the Removal of CO2. Medforfatter Hermann Harde, PDF nedlastbar her. Sammendraget starter slik:
An in-depth analysis is performed on the record of atmospheric 14CO2, an isotopic tracer of CO2 that was perturbed by nuclear testing. In addition to long-term behavior, we examine short-term changes that have been largely ignored. It pays to look closely. Those changes reveal the underlying mechanisms responsible for the observed decline of atmospheric 14CO2 and, thereby, for removal of overall CO2. They represent effective absorption that is considerably faster than appears in the average decline of 14CO2, initially and then later in its long-term decline. The average decline of 14CO2 is slowed initially by periodic re-enrichment from the stratosphere, which offsets direct absorption at the Earth’s surface. Eventually, however, its decline is slowed by re-emission of absorbed 14CO2 from the Earth’s surface, which likewise offsets direct absorption.
Control of Atmospheric CO2, part 2
Influence of Tropical Warming. Medforfatter Hermann Harde, PDF nedlastbar her. Sammendraget starter slik:
Unlike much of the Earth, surface temperature in the tropics underwent a systematic and sustained increase during the satellite era. Due to the temperature dependence of surface processes which regulate CO2 emission, that long-term change should exert a similar influence on atmospheric CO2. We develop how this influence would manifest in the evolution of CO2. Observed records are then used to investigate the interdependence of surface temperature and net CO2 emission – the component of emission that actually changes CO2.