Sentences with phrase «nao mode»

The first EOF mode of low - frequency precipitation variability over North America is accompanied by a negative NAO mode in SLP (Fig. 6d).

Most recorded events appear to be linked with cooling episodes, mostly in winter, a transition to or from a negative winter NAO mode, a positive AMO mode.

Fresh or warm oceans in association with a positive NAO mode are stormy but with very low sting storms frequency.

The strongest storms correspond to low AMO and decennial - negative NAO modes (e.g. «Little Ice Age»), or high AMO in association with dominant low NAO modes, as during the early Middle Age and present - day period.

Not exact matches

The NAO (North Atlantic oscillation) is one of the most dominant modes of global climate variability.

The North Atlantic Oscillation (NAO) is Europe's dominant mode of climate variability.

Here we demonstrate that the multidcadal variability in NHT including the recent warming hiatus is tied to the NAT - NAO - AMO - AMOC coupled mode and the NAO is implicated as a useful predictor of NHT multidecadal variability.

[Response: The NAO is really just a measure of the dominant mode of variability of the Northern Hemisphere jet stream over the North Atlantic and neighboring regions.

Ironically, while some continue to attack this nearly decade - old work, the actual scientific community has moved well beyond the earlier studies, focusing now on the detailed patterns of modeled and reconstructed climate changes in past centuries, and insights into the roles of external forcing and internal modes of variability (such as the North Atlantic Oscillation or «NAO» and the «El Nino / Southern Oscillation» or «ENSO») in explaining this past variability.

The NAO and NAM (or AO as some call it) are natural modes of variability.

of hurricanes and the PDO / NAO / ENSO modes in different periods of the past.

And indeed, solar may trigger some of the internal variations, which may include the AMO / NAO / AO... If the rather uniform warming by GHGs triggers similar internal modes (and cloud cover), that is another question.

Variability in the marine carbon cycle has been observed in response to physical changes associated with the dominant modes of climate variability such as El Niño events and the PDO (Feely et al., 1999; Takahashi et al., 2006), and the NAO (Bates et al., 2002; Johnson and Gruber, 2007).

The NAO is the dominant mode of winter climate variability in the North Atlantic region ranging from central North America to Europe and much into Northern Asia.

More recent work is identifying climate shifts working through the El Niño - Southern Oscillation (ENSO), Atlantic Multidecadal Oscillation (AMO), Pacific Decadal Oscillation (PDO), North Atlantic Oscillation (NAO), Southern and Northern Annular Modes (SAM and NAM), Artic Oscillation (AO), Indian Ocean Dipole (IOD), North Pacific Oscillation (NPO) and other measures of ocean and atmospheric states.

Periods of more frequent storm events over the two last centuries are analysed first in order to link these events with possible forcing mechanisms (North Atlantic Oscillation (NAO) and Atlantic Multidecadal Oscillation (AMO) modes) triggering the most destructive storms.

This decline will be due to the items that control the climate, the sun, volcanic activity, soi oscillation, pdo / amo, nao, ao all phasing toward a cooler mode.

They constructed a numerical network model from 4 observed ocean and climate indices — ENSO, PDO, the North Atlantic Oscillation (NAO) and the Pacific Northwest Anomaly (PNA)-- thus capturing most of the major modes of climate variability in the period 1900 — 2000.

Proxy evidence suggests a strongly positive NAO and persistent La Nina mode of ENSO over the period ~ 1050 — 1400CE, possibly operating together as a self - reinforcing positive feedback loop (Trouet et al. 2009).

As an intrinsic mode of variability of the large - scale atmospheric circulation, the NAO requires no external forcing for excitation (e.g., Hurrell and Deser 2009; Branstator and Selten 2009).

Particular attention will be given to changes in naturally occurring modes of variability such as ENSO, the Arctic Oscillation (AO; and its more spatially restricted counterpart, the North Atlantic Oscillation, NAO) and the Antarctic Oscillation (AAO) etc..

The North Atlantic Oscillation (NAO), the dominant mode of atmospheric circulation variability over the North Atlantic / European sector, is a leading governor of wintertime climate fluctuations in Europe, the Mediterranean, parts of the Middle East and eastern North America over a wide range of time scales from intra-seasonal to multi-decadal (e.g., Hurrell 1995; Hurrell et al. 2003).

This study has highlighted the role of internal variability of the NAO, the leading mode of atmospheric circulation variability over the Atlantic / European sector, on winter (December - March) surface air temperature (SAT) and precipitation (P) trends over the next 30 years (and the next 50 years: see Supplemental Materials) using a new 40 - member ensemble of climate change simulations with CESM1.

The leading mode explains 45 % of the SLP trend variance and resembles the NAO, reinforcing the notion that the NAO is not only a dominant mode of variability on interannual time scales, but also on multi-decadal time scales (Fig. 2a).

S6), indicating that the NAO and its terrestrial climate impacts are primarily a result of intrinsic atmospheric dynamics: i.e., this mode does not rely on air - sea interaction for its existence or dominant characteristics.

The NAO went into a strongly + ve mode from 1989 to 1995, having a role in expulsion of Arctic multi-year ice through the Fram Strait.

The Medieval Climate Anomaly in the Iberian Peninsula reconstructed from marine and lake records Moreno et al, 06/2012; ``... a persistent positive mode of the North Atlantic Oscillation (NAO) dominated the Medieval Climate Anomaly (MCA: 900 — 1300 AD).»

The changes in the flow project strongly onto the Southern annular mode and North Atlantic Oscillation (NAO), respectively.

Additionally, several climatological oscillatory mode data will be used as controls to assess the correlations between GCR flux, solar activity, and cloud cover: specifically the Atlantic Multidecadal Oscillation (AMO), the multivariate El Nino Southern Oscillation (ENSO), the North Atlantic Oscillation (NAO), the Pacific Decadal Oscillation (PDO), and the Quasi-Biennial Oscillation (QBO).

The modes of natural internal variability of greatest relevance are the Atlantic modes (AMO, NAO) and the Pacific models (PDO, often referred to as IPO) of multidecadal climate variability, with nominal time scales of 60 - 70 + years.