Tree rings and volcanic cooling
نویسندگان
چکیده
منابع مشابه
Cooling Following Large Volcanic Eruptions Corrected for the Effect of Diffuse Radiation on Tree Rings
The lack of a larger cooling in proxy records of climate change following large volcanic eruptions such as those of Tambora in 1815 and Krakatau in 1883 has long been a puzzle for climatologists. These records, however, may have been biased by enhanced tree growth for several years following each eruption induced by additional diffuse radiation caused by the stratospheric volcanic aerosol cloud...
متن کاملTemperature reconstructions from tree-ring densities overestimate volcanic cooling
The fidelity of inferences on volcanic cooling from tree-ring density records has recently come into question, with competing claims that temperature reconstructions based on tree-ring records underestimate cooling due to an increased likelihood of missing rings or overestimate cooling due to reduced light availability accentuating the response. Here we test these competing hypotheses in the la...
متن کاملBristlecone pine tree rings and volcanic eruptions over the last 5000 yr
Many years of low growth identified in a western USA regional chronology of upper forest border bristlecone pine (Pinus longaeva and Pinus aristata) over the last 5000 yr coincide with known large explosive volcanic eruptions and/or ice core signals of past eruptions. Over the last millennium the agreement between the tree-ring data and volcano/ice-core data is high: years of ring-width minima ...
متن کاملUnderestimation of volcanic cooling in tree-ring-based reconstructions of hemispheric temperatures
The largest eruption of a tropical volcano during the past millennium occurred in AD 1258–1259. Its estimated radiative forcing was several times larger than the 1991 Pinatubo eruption1. Radiative forcing of that magnitude is expected to result in a climate cooling of about 2 C (refs 2–5). This effect, however, is largely absent from tree-ring reconstructions of temperature6–8, and is muted in ...
متن کاملDo volcanic eruptions enhance or diminish net primary production? Evidence from tree rings
[1] Low growth rates of atmospheric CO2 were observed following the 1991 Pinatubo (Luzon) volcanic eruption. One hypothesis for this CO2 anomaly is that since diffuse light is more efficiently used by forests than direct light, the increase in the diffuse fraction of sunlight due to scattering by volcanic sulfur aerosol in the years following the eruption substantially increased forest net prim...
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ژورنال
عنوان ژورنال: Nature Geoscience
سال: 2012
ISSN: 1752-0894,1752-0908
DOI: 10.1038/ngeo1645