Sentences with phrase «trend over the past century»

[ANDY REVKIN notes: One reason for the statistical gridlock is the murkiness of the data on the things that matter most (hurricane trends over the past century, for instance).

Contrary to the book's premise, multiple studies and surveys have shown that 97 percent or more of actively publishing climate scientists agree that climate warming trends over the past century are due to human activities (NASA for example).

«To conclude, modeled atmospheric circulation and SST trends over the past century are significantly different from the observed ones.

While we might expect that a warming ocean should mean stronger storms right across the globe, assessing a global trend over the past century is difficult.

According to NASA, «Multiple studies published in peer - reviewed scientific journals show that 97 percent or more of actively publishing climate scientists agree: Climate - warming trends over the past century are extremely likely due to human activities.»

In the most realistic case of half - field capacity, the July daily minimum temperature in the California Central Valley increased by 3.5 °C, in agreement with station observation trends over the past century in the same area.

«Multiple studies published in peer - reviewed scientific journals1 show that 97 % or more of actively publishing climate scientists agree: Climate - warming trends over the past century are very likely due to human activities.

Perhaps we should be less concerned with identifying trends over past centuries, where we are bound to have all kinds of data problems.

I can look at the temperature trend over the past century and state this trend is increasing over the past 100 years.

«Multiple studies published in peer - reviewed scientific journals show that 97 percent or more of actively publishing climate scientists agree: Climate - warming trends over the past century are extremely likely due to human activities.»

Not exact matches

But this trend has significantly reversed over the past two centuries.

Demographic trends have shifted dramatically in the U.S. over the past half century toward an older population, and hence potential growth has to be structurally lower today, even as we hire great numbers of people (to say nothing of deploying ever greater numbers of robots).

But, given the development of liberalism over the past two centuries, this would seem to require a deliberate act of the will contrary to long «unfolding and deep «seated historical trends.

Gateway attributes it success over the past quarter - century to not only growing by expansion, but by being dynamic and keeping pace with market trends.

The research, commissioned by Linda McCartney Foods to celebrate the famous vegetarian food brand's 25th birthday, looked back at food trends over the past quarter of a century and forward to the next quarter.

Because of the strong recent warming, the updated trend over 1906 to 2005 is now 0.74 ± 0.18 degree C. Note that the 1956 to 2005 trend alone is 0.65 ± 0.15 degree C, emphasizing that the majority of 20th - century warming occurred in the past 50 years.

The researchers documented that the North Pacific High has become more variable over the past century, and that these trends have been imprinted on physical and biological indicators from the continental slope to the Sierra Nevada and beyond.

The epicenter of agricultural production has moved north and west over the past half - century, and that trend will likely continue at an accelerated pace due to global warming, a new study finds.

The model also fails to fully account for the dramatic technological, economic, and demographic trends that have swept the world over the past century, says economist Holger Strulik, a visiting professor at Brown University.

In the paper Retreating Glacier Fronts on the Antarctic Peninsula over the Past Half - Century published this week in Science, we presented new data describing trends in 244 marine glacier fronts on the Antarctic Peninsula over the last 50 years.

Past analyses have found ENSO was responsible for 15 to 30 % of interseasonal variability but little of the global warming trend over the past half century (Jones 1989, Wigley 2000, Santer 2001, Trenberth 2002, Thompson 20Past analyses have found ENSO was responsible for 15 to 30 % of interseasonal variability but little of the global warming trend over the past half century (Jones 1989, Wigley 2000, Santer 2001, Trenberth 2002, Thompson 20past half century (Jones 1989, Wigley 2000, Santer 2001, Trenberth 2002, Thompson 2008).

Burke blames the national trend of lower scores on «increasing federal intervention over the past half - century... the resulting burden of complying with federal programs, rules, and regulations, have created a parasitic relationship with federal education programs and states, and is straining the time and resources of local schools.

It is long past time to move to the next level of reform and accountability — the extrinsic type — and this is the trend we must and will see over the next several decades in what I believe will be the civil rights revolution of the 21st century, which I think will play out simultaneously on the two tracks I have just mentioned: the delivery system for education and the means by which we prepare and compensate educators, primarily teachers.

In clean, bright, and provocative language, a cultural critic and historian discusses trends in art, literature, music, and history over the past five centuries.

Huang, Shaopeng, Pollack, Henry N., and Shen, Po - Yu (2000) «Temperature trends over the past five centuries reconstructed from borehole temperatures,» Nature, 403 (17 February 2000), 403, 756 - 758.

Even the IPCC does not concur, stating that the «Current datasets indicate no significant observed trends in global tropical cyclone frequency over the past century and it remains uncertain whether any reported long - term increases in tropical cyclone frequency are robust.»

The trend is 3.3 mm / year, about double the 20th century trend and clearly an acceleration over the past 50 years.

These changes bode well for the future of American health and are indicative of a wider trend toward acknowledging home - cooked food's protective and healing power — something that was once a given, when it was all people had to work with, but then lost its status with the rise of cheap, effective pharmaceuticals (not to mention accessibility to processed food) over the past half - century.

-- 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,....»

«Century of Data Shows Intensification of Water Cycle but No Increase in Storms or Floods Released: 3/15/2006 12:13:21 PM» (excerpt) A review of the findings from more than 100 peer - reviewed studies shows that although many aspects of the global water cycle have intensified, including precipitation and evaporation, this trend has not consistently resulted in an increase in the frequency or intensity of tropical storms or floods over the past cCentury of Data Shows Intensification of Water Cycle but No Increase in Storms or Floods Released: 3/15/2006 12:13:21 PM» (excerpt) A review of the findings from more than 100 peer - reviewed studies shows that although many aspects of the global water cycle have intensified, including precipitation and evaporation, this trend has not consistently resulted in an increase in the frequency or intensity of tropical storms or floods over the past centurycentury.

When using longer datasets in the northern hemisphere such as US landfalls over the past century, no trend emerges in the second half of last century.

In short, an objective look at the data is equivocal at best as to the true trend in the tropical Pacific ocean - atmosphere system over the past century.

What is fairly hypocritical is to publicly claim that the data over the past few centuries is good enough to support this AMO explanation for hurricane activity, while at the same time claiming that the data is too poor to produce a statistically relevant trend over the past few decades.

States that while no significant trends have been identified in the Atlantic since the late 19th century, significant observed trends in TC numbers and intensities have occurred in this basin over the past few decades, and trends in other basins are increasingly being identified

Generally, the remaining uncorrected effect from urban heat islands is now believed to be less than 0.1 C, and in some parts of the world it may be more than fully compensated for by other changes in measurement methods.4 Nevertheless, this remains an important source of uncertainty.The warming trend observed over the past century is too large to be easily dismissed as a consequence of measurement errors.

The PAGES 2k team found that a global surface cooling trend over the past 2,000 years has been erased by the global warming over the past century.

«Current datasets indicate no significant observed trends in global tropical cyclone frequency over the past century» 2.

Volcanic activity proceeds over the decades at a level of only about 1 percent of industrial CO2 emissions, and even major eruptions observed during the past century have changed atmospheric CO2 trends only minimally and transiently.

The forests of the eastern United States (including the Midwest) have been accumulating large quantities of carbon over the past century, 26 but evidence shows this trend is slowing in recent decades.

Your comment on error bars over short time periods makes sense, but the UAH record would tell us that 21st century total warming would be around 1C, if past trends continue (and that was the point I wanted to make).

This slideshow shows how well models predict past temperature trends, and the extent to which human activity was the primary cause of warming over the last century.

Working with a total of 2,196 globally - distributed databases containing observations of NPP, as well as the five environmental variables thought to most impact NPP trends (precipitation, air temperature, leaf area index, fraction of photosynthetically active radiation, and atmospheric CO2 concentration), Li et al. analyzed the spatiotemporal patterns of global NPP over the past half century (1961 — 2010).

Jones et al., 2016 http://www.nature.com/nclimate/journal/v6/n10/full/nclimate3103.html «Most observed trends [over the 36 - year satellite data] are not unusual when compared with Antarctic palaeoclimate records of the past two centuries.

The trend in numbers of major hurricanes making landfall in the United States has been slightly downward over the past century.

The pattern of rainfall over the past century does not point to a trend of reduction in rainfall.

As he pointed out, a dominant unforced contribution to surface warming relative to forced trends would be expected to be accompanied by a trend of declining OHC, which is inconsistent with the observed trends averaged over the past half century as evidenced by mixed layer temperature measurements and sea level rise.

The first decade of this century was the warmest on record for more than a century, part of a trend in increasing warmth over the past 50 years, according to the U.S. National Oceanographic and Atmospheric Administration.

Orbital forcing changes associated with 5 deg C or greater variation but operating over 22,000 to 100,000 years, or diurnal variations of 5 to 10 C between mid-afternoon and pre-dawn temperatures are largely irrelevant to century long trends, such as the 0.8 C temperature rise during the past 100 years.

Over the past few hundred years, there has been a steady increase in the numbers of sunspots, a trend that has accelerated in the past century, just at the time when the Earth has been getting warmer.

Temperature trends over the past five centuries reconstructed from borehole temperatures.