Sentences with phrase «reanalysis over»

The graph at right shows how much warmer each month is than the annual global mean (derived from the MERRA2 reanalysis over 1980 - 2015 with an uncertainty range).

ECMWF, WCRP and the Copernicus Climate Change Service are organising the 5th International Conference on Reanalysis over five days, 13 - 17 November 2017 in Rome, Italy.

In a second step, we apply the method to reconstructing 2 - D sea level data over 1950 — 2003, combining sparse tide gauge records available since 1950, with EOF spatial patterns from different sources: (1) thermosteric sea level grids over 1955 — 2003, (2) sea level grids from Topex / Poseidon satellite altimetry over 1993 — 2003, and (3) dynamic height grids from the SODA reanalysis over 1958 — 2001.

ECMWF, WCRP and the Copernicus Climate Change Service are organising the 5th International Conference on Reanalysis over five days, 13 - 17 November 2017 in Rome, Italy.

Not exact matches

This involves a combination of satellite observations (when different satellites captured temperatures in both morning and evening), the use of climate models to estimate how temperatures change in the atmosphere over the course of the day, and using reanalysis data that incorporates readings from surface observations, weather balloons and other instruments.

Challenging the Research Base of the Common Core State Standards: A Historical Reanalysis of Text Complexity Educational Researcher, October 2013 Researchers find that contrary to the authors of the English Language Arts component of the Common Core State Standards (CCSS)-- which builds a case for higher complexity in textbooks and reading materials for students by pointing to research showing a steady decline in the difficulty of student textbooks over the past 50 years — text complexity actually has either risen or stabilized over this time.

Rothstein's reanalysis of the MET report's results found that over 40 percent of those whose state exam scores place them in the bottom quarter of effectiveness are in the top half on the alternative assessment.

Using NCEP / NCAR reanalysis the only weather that stands out as being anomalous is a high pressure system over the Arctic in 2010 presumably related in some way to high temperatures.

TRMM only covers 50S - 50N, but according to the reanalysis data, precip rates for the study area for the TRMM study area were about 6x that of the poleward areas, averaged over 1979 - 2016.

... a pronounced strengthening in Pacific trade winds over the past two decades — unprecedented in observations / reanalysis data and not captured by climate models — is sufficient to account for the cooling of the tropical Pacific and a substantial slowdown in surface warming through increased subsurface ocean heat uptake.

Abstract:... Here we show that a pronounced strengthening in Pacific trade winds over the past two decades — unprecedented in observations / reanalysis data and not captured by climate models — is sufficient to account for the cooling of the tropical Pacific and a substantial slowdown in surface warming through increased subsurface ocean heat uptake.

-- I calculated potential intensity trends over the period 1980 - 2012 & The disparity between the reanalysis potential intensity trends over the past 30 years and the projected trends over this century suggests either that most of the observed increase in potential intensity (and actual intensity of high category storms) is due to natural variability,....»

I calculated potential intensity trends over the period 1980 - 2012 using three different reanalysis products: NASA's MERRA, the European Center's ERA Interim, and the NCAR / NCEP reanalysis.

In a recent article published in the journal Nature, Kossin et al. (2014) use satellite data and reanalysis products to see if there has been a shift in the latitudes at which tropical storms reach their maximum intensity over the 1982 - 2012 period.

So I was wondering over which period the radiation fluxes and cloud variables are calculated (e.g., the first 12 hours of each forecast) in each reanalysis.

I'm leaning towards using a boilerplate reanalysis to estimate energy changes from the top of the atmosphere down to 300 meters below sea level over the last 50 years.

The NARR reanalysis was done to produce very high resolution output over the North American region.

Using the whole period of data leads to an uncertainty estimate which is a compound of the desired uncertainty, and a bias estimate based on an average over the total span of the reanalysis dataset.

We will analyze synoptic - scale weather patterns from global reanalysis models over the past 50 years, utilizing a variety of techniques including self - organizing maps, such that these weather patterns can be tied to variations in core proxies, as well as relate this to ten years (2003 - 2013) of records from about a dozen automated weather stations located on and near McCall Glacier.

Figure 4: Temperature Anomalies (1951 - 1981 Baseline) for the Arctic region (64 - 90 ° N) over the past 130 years according to ccc - gistemp analysis and NCEP reanalysis data.

Payne, A.E. and G. Magnusdottir, 2014: Dynamics of landfalling atmospheric rivers over the North Pacific in thirty years of MERRA reanalysis.

Resolution: Horizontal 12 km in the Arctic to < 16 km in North Atlantic, Vertical 28 hybrid layers, 3m top layer Download Data: marine.copernicus.eu Contact: Laurent Bertino (topaz (at) nersc.no) References: Xie, J., Bertino, L., Counillon, F., Lisæter, K. A., and Sakov, P.: Quality assessment of the TOPAZ4 reanalysis in the Arctic over the period 1991 — 2013, Ocean Sci., 13, 123 - 144, https://doi.org/10.5194/os-13-123-2017, 2017.

we have an update of the GLORYS2V1 reanalysis, e.g. GLORYS2V4, now over the 1993 - 2016 periods at 1/4 °, would it be possible to update informations for GLORYS on your website?

Time series of the observed amplitudes (in meters per second) of zonal wave numbers m = 6 (black), m = 7 (red), and m = 8 (blue) for the 15 - d running means of the meridional wind velocity at 300 hPa averaged over 37.5 ° N − 57.5 ° N for May − September 2012 and 2013, based on daily reanalysis data (41).

He goes on to conclude that the small fractional change in station wind - speed values relative to reanalysis values are unlikely to have caused a global bias in trends of Tmin in calm conditions approaching -0.1-C over the 50 - year period, equivalent to -0.02-C / decade, 1 / 10 - th of the observed warming signal.

Using Parker's method and assuming that the reanalysis wind accurately reflects the true wind I would expect to see Parker's «calm» and «windy» plots diverge by 0.23 C over the 50 years.

1) The NCEP / NCAR Reanalysis project is probably much easier to work with to get comparisons over a 50 - year period.

January (left) and February (right) surface air temperature anomaly over the Arctic based on NCEP / NCAR reanalysis.

These twelve - month running - mean time series of precipitation amounts averaged over continental land areas and the European sub-regions include values from JRA - 55 and values available to date from ERA5, the reanalysis currently in production to supersede ERA - Interim.

The near - surface temperature anomalies [degrees C], relative to a 1981 - 2010 base period from NCEP - NCAR reanalysis, averaged over November - March for (left) La Niña winters without any SSWs, (middle) La Niña winters with at least one SSW, and (right) observed conditions in 2017 - 18.

This study assesses the relationship between upstream blocking and cold temperature extremes over North America in observations, reanalysis products (ERA - Interim and NARR), and RCMs (CanRCM4, CRCM5, HIRHAM5, and RCA4).

The North American Regional Reanalysis (NARR) displays a diurnal circulation pattern centered over Northern Texas that links together regional patterns in the diurnal cycles of assimilated precipitation.

Reanalysis data from 1948 to 2005 indicate weakening westerlies over this time period, a trend leading to relatively cooler temperatures on the east slope over decadal timescales.

Figure 1: Temperature Anomalies (1951 - 1981 Baseline) for the Arctic region (64 - 90 ° N) over the past 130 years according to ccc - gistemp analysis and NCEP reanalysis.

Monitoring precipitation over the terrestrial Arctic drainage: data requirements, shortcomings and applications of atmospheric reanalysis.

The controversial connection between cosmic rays, solar activity, and cloud cover is investigated using a climatological reconstructed reanalysis product: the North American Regional Reanalysis which provides high - resolution, low, mid-level, high, and total cloud cover data over a Lambert conformal conic projection permitting land / ocean discrreanalysis product: the North American Regional Reanalysis which provides high - resolution, low, mid-level, high, and total cloud cover data over a Lambert conformal conic projection permitting land / ocean discrReanalysis which provides high - resolution, low, mid-level, high, and total cloud cover data over a Lambert conformal conic projection permitting land / ocean discrimination.

Reanalysis of the original Svensmark & Friis - Christensen (1997) results over a longer time period using a discrimination of cloud height found that the correlation was restricted to low level (> 680 mb / < 3.2 km) cloud only (Pallé & Butler 2000).

Reanalysis is a scientific method for developing a comprehensive record of how weather and climate are changing over time.

Taking into account the uncertainties, both methodologies place 2014 within the top 10 % of the warmest years over the reanalysis period (since 1979), demonstrating the consistency of these various estimates.

A reanalysis typically extends over several decades or longer, and covers the entire globe from the Earth's surface to well above the stratosphere.

The radiosonde network has been around for over 50 years, and typically most operational forecast NWP models as well as reanalysis models treat the raobs similarly.

Over the 19 years of the ERA Interim reanalysis there are no significant trends in q.

Ryan Maue, if we assume that Kevin Trenbreth has the seminal paper on atmospheric water vapor products in the paper: «Trends and variability in column - integrated atmospheric water vapor», then I have the distinct view that we only have water vapor data that would pass muster with Trenberth for the period 1988 forward and only over the oceans in the form of the RSS SSM / I measurements / reanalysis.

Observed and simulated cloud properties will be considered within the context of the aerosol and meteorological environment over the West Antarctic Ice Sheet using ancillary AWARE, reanalysis and satellite measurements.

My question would be, using the various available reanalysis algorithms, can we definitely and statistically say a trend different than zero exists over the past 20 years or time period when all / most agree that we have a reasonably valid measurement / reanalysis.

The excerpts below point to the authors» preference for RSS over the other reanalysis.

Using NCEP - 2 reanalysis data, Lim and Simmonds (2002) showed that for 1979 to 1999, increasing trends in the annual number of explosively developing (deepening by 1 hPa per hour or more) extratropical cyclones are signifi cant in the SH and over the globe (0.56 and 0.78 more systems per year, respectively), while the positive trend did not achieve signifi cance in the NH.

In a paper examining trends in cirrus (due to contrails) between 1971 and 1995, Minnis et al. (JC, 2004) showed negative trends in Rh at 300 mb over most non-polar areas based on the NCEP reanalysis.

Therefore, there are reasons to expect that there has been a downward trend in moist stability in the Atlantic over the past few decades, independent of the reliability of the tropical mean trend in the reanalysis.

Regarding flatness over this period, the Lyman and Johnson paper referenced by Judith says this: «In recent years, from 2004 to 2011, while the upper ocean is not warming, the ocean continues to absorb heat at depth (e.g., Levitus et al. 2012; von Schuckman and Le Traon 2011), here estimated at a rate of 0.56 Wm2 when integrating over 0 — 1800 m.» That 0.56 Wm2 figure is again pretty close to what the Balmeseda et al. reanalysis produces.