Sentences with word «hydroclimatic»

Tree ring - derived Palmer Drought Severity Index (PDSI) time series have been widely used to estimate the spatial extent, duration, timing, and intensity of droughts from the past millennium across the American Southwest [31 — 37], but the amplitude and variance of hydroclimatic variability have received significantly less attention (but see [38]-RRB-.

In this study, we demonstrate that the Little Ice Age (LIA, ~ 1400 — 1850 CE) might be more representative of future hydroclimatic variability than the conditions during the MCA megadroughts for the American Southwest, and thus provide a useful scenario for development of future water - resource management and drought and flood hazard mitigation strategies.

Pairing these records enables scientists to infer past hydroclimatic variations under changing climatic states like the industrial period, the Little Ice Age, and the Last Interglacial.

Application of the toy model gives traces that can resemble historical time series of hydroclimatic variables, such as temperature, rainfall and runoff.

Thus, warm droughts of the prehistoric past might provide evidence useful in understanding the current climatological changes, and for providing scenarios for worst - case droughts of the future and evidence of hydroclimatic responses in the Southwest to warmer climatic conditions.

Our tree ring - based analysis of past drought indicates that the Little Ice Age (LIA) experienced high interannual hydroclimatic variability, similar to projections for the 21st century.

Steirou, E., and Koutsoyiannis, D. (2012) Investigation of methods for hydroclimatic data homogenization.

This study analyzed potential hydroclimatic change in the Peace River basin in the province of British Columbia, Canada, based on two structurally different approaches: (i) statistically downscaled global climate models (GCMs) using the bias - corrected spatial disaggregation (BCSD) and (ii) dynamically downscaled GCM with the Canadian Regional Climate Model (CRCM).

As a result, small surpluses or deficits in the number of precipitation events translate into relatively large hydroclimatic swings from wet to dry years.

Investigation of methods for hydroclimatic data homogenization, Steirou, E., and D. Koutsoyiannis, 07/2012; read more here.

It is demonstrated that a simple deterministic model in discrete time can capture the scaling behaviour of hydroclimatic processes at time scales coarser than annual.

A new Indonesian coral - based record of surface ocean salinity shows that the location of the most significant hydroclimatic feature in the Southern Hemisphere, the South Pacific Convergence Zone (SPCZ), a band of high clouds and precipitation, influences a major current in the far western Pacific Ocean.

The linkages between these changes in Southwest hydroclimatic variance and changes in the Pacific are consistent with modeled and observed historical teleconnections between the Pacific and North America [19,25] and, taken together, support a pervasive relationship between the evolution and variability of the ENSO system and the evolution of drought amplitude and variability in the Southwest [38].

Such differences reemphasize the uncertain nature of future hydroclimatic projections.

Recent warming is unprecedented, but modern hydroclimatic variations may have at times been exceeded in magnitude and duration.

Ljungqvist, F. C. et al. (2016) Northern Hemisphere hydroclimatic variability over the past twelve centuries, Nature, doi: 10.1038 / nature17418.

Furthermore, since the end of the 19th century, we find an increasing variance in multidecadal hydroclimatic winter and spring, and this coincides with an increase in the multidecadal North Atlantic Oscillation (NAO) variability, suggesting a significant influence of large - scale atmospheric circulation patterns.

Drought variations in the study area significantly correlated with sea surface temperatures (SSTs) in North Pacific Ocean, suggesting a possible connection of regional hydroclimatic variations to the Pacific Decadal Oscillation (PDO).

«The discrepancy could arise, of course, from the opposite problem: that the palaeoclimate proxy data are underestimating hydroclimatic extremes.

Hydroclimatic risks and uncertainty in the global power sector.

An 850 - Year Hydroclimatic History of Northwestern China.

Attendees also discussed complicated problems, including hydroclimatic responses to situations where anomalous events like the 2015 — 2016 El Niño are superimposed onto long - term heterogeneous ocean - warming patterns.

It is easy to implement but falls short in modeling complicated hydroclimatic interactions that may lead to drought.

The large interannual to decadal hydroclimatic variability in winter precipitation is highly influenced by sea surface temperature (SST) anomalies in the tropical Pacific Ocean and associated changes in large - scale atmospheric circulation patterns [16].

It can be argued that they often lead to false results: natural features of hydroclimatic time series are regarded as errors and are adjusted.»

Reconstructing hydrological change is challenging because of greater inherent spatial heterogeneity of hydroclimatic variables; additionally, covariance with temperature responses in paleoclimatic archives can complicate their integration into reconstruction of a single regionally averaged and time - averaged target variable.

As further warming is anticipated in this region of the Pacific and elsewhere, enhanced hydroclimatic variability might be expected across southwestern North America in the coming century.

Megadroughts in North America: Placing IPCC projections of hydroclimatic change in a long - term paleoclimate context

A pattern of enhanced fire activity during times of increased variability in ENSO and Southwest hydroclimatic conditions could imply a trajectory towards a more fire - prone Southwest during the 21st century [7,13].

However, some areas of the American Southwest will likely become periodically more arid than the range of observations recorded over the last century [1,2], and thus the assumption of stationarity for forecasting future hydroclimatic variability is not justified [3].

Here we show that interannual hydroclimatic variability in this region has displayed a significant level of non-stationarity over the past millennium.