Sentences with phrase «global warmth»

The key take - home conclusion is that the rate and magnitude of recent global warmth appears unprecedented for at least the past 4,000 years and the rate at least the past 11,000.

It is not any one proxy, but the agreement among them, that provides the most convincing evidence that the recent global warmth is very unlikely to be due to natural causes.

Current spatial coverage, temporal resolution and age control of available Holocene proxy data limit the ability to determine if there were multi-decadal periods of global warmth comparable to the last half of 20th century.

As noted by Jones and Mann (2004)[Jones, P.D., Mann, M.E., Climate Over Past Millennia, Reviews of Geophysics, 42, RG2002, doi: 10.1029 / 2003RG000143, 2004], arguments that such evidence supports anomalous global warmth during this time period is based on faulty logic and / or misinterpretations of the available evidence.

It is notable that the record global warmth of 2014 was achieved in a year in which the tropical Pacific Ocean surface temperatures were in a nearly ENSO (El Niño Southern Oscillation) neutral or very weak El Niño state.

The mid-Pliocene (∼ 3 to 3.3 Ma ago), is a period of sustained global warmth in comparison to the late Quaternary (0 to ∼ 1 Ma ago), and has potential to inform predictions of long - term future climate change.

«The Nasa climate scientists who claimed 2014 set a new record for global warmth last night admitted they were only 38 % sure this was true.»

The Nasa climate scientists who claimed 2014 set a new record for global warmth last night admitted they were only 38 per cent sure this was true.

When global warmth returned, those newly minted species could then spread worldwide — as long as they didn't run into gaps between continents too big for them to fly across.

During the Last Interglacial Period (about 129,000 to 116,000 years ago) when peak global warmth was not more than 2 °C above pre-industrial temperatures, and peak global annual sea surface temperatures were 0.7 [0.1 to 1.3] °C warmer (medium confidence), maximum GMSL was at least 5 m higher than at present (very high confidence), but did not exceed 10 m (high confidence).

A contribution to decadally averaged global warmth at that time is likely to have arisen from closely spaced multiple El Niño events centred near 1939 to 1941 and perhaps 1942 to 1944 (Bigg and Inonue, 1992; and Figure 2.29).

Past periods of extreme global warmth, exemplified by the Eocene (55 to 35 million years ago), provide a good testing ground for theories for this interaction.

The remarkably consistent monthly global warmth of 1998 is discussed in Karl et al. (2000).

«It was really global warmth that we saw in 2016, even more so than 2015,» said Derek Arndt, chief of the monitoring branch at NOAA's National Centers for Environmental Information in Asheville, N.C.

Briefly, the available proxy evidence indicates that global warmth during this period was not particularly pronounced, though some regions may have experienced greater warming than others.

CRU has 1998 as the warmest year but there are differences in methodology, particularly concerning the Arctic (extrapolated in GISTEMP, not included in CRU) which is a big part of recent global warmth.

Concentration of carbon dioxide during an intense period of global warmth may have been as low as half the level previously suggested by scientists, according to a new Dartmouth College study.

The previous periods of global warmth had thick subtropical vegetation over large parts of the world.

Recent research highlights include new sea surface temperature records for the Paleogene and biomarker records for methane cycling and hydrological changes during past episodes of global warmth.

al.): «We propose that the early Eocene peak in global warmth and sea level (Fig. 3) was due not only to slightly higher ocean - crust production but also to a late Paleocene - early Eocene tectonic reorganization.