Latest news with #data analysis
Forbes
a day ago
- Science
- Forbes
Scientists Reconstruct 540 Million Years Of Climate And Sea Level Change
Climate curve and sea level curve Two new studies offer the most detailed glimpse yet of how Earth's climate and sea levels have changed during the Phanerozoic — the latest geologic eon covering the time period from 538.8 million years ago to the present. The first curve reveals that Earth's temperature has varied more than previously thought over much of the Phanerozoic eon and also confirms that Earth's temperature is strongly correlated to carbon-dioxide levels in the atmosphere. The team from Arizona compiled more than 150,000 published data points, their colleagues at the University of Bristol generated more than 850 model simulations of what Earth's climate could have looked like at different periods based on continental position and atmospheric composition. Using special data assimilation protocolls, the different datasets were combined to create an accurate curve of how Earth's temperature has varied over the past 485 million years. The climate curve reveals that temperature varied more greatly than previously thought. It starts with the Hirnantian, a period of major climatic oscillation lasting from approximately 460 to around 420 million years. The coldest period in the analyzed timescale is the Karoo glaciation, lasting from approximately 360 to 260 million years. But overall, the Phanerozoic was characterized by mild to warm climates, with global mean surface temperatures spanning from 52 to 97 degrees Fahrenheit (or 11 to 36 degrees Celsius). In the warmest periods global temperatures did not drop below 77 degrees Fahrenheit (25 degrees Celsius). In the last 60 million years, after a peak during the "Cretaceous Hothouse," Earth started to cool down. The global average temperature today is about 59 degrees Fahrenheit (15 degrees Celsius). The authors also note that the periods of extreme heat were most often linked to elevated levels of the greenhouse gas carbon-dioxide in the atmosphere. The second curve shows how sea levels correlate both with tectonic activity - closing or opening oceanic basins and shifting continents - and the climate, determining how much water is trapped in ice caps or glaciers. 'Plate tectonics determines the depth of the oceans. If the 'bathtub' becomes shallower, then the water level will rise. Ice caps on continents withhold water from the ocean, but when the ice melts, the 'bath water level' will rise, " explains study lead author Dr. Douwe van der Meer, guest researcher at Utrecht University. To assess sea level changes, the scientists looked at the prevailing sediment type deposited at the time. Claystone typically forms in deeper marine settings, while sandstone is deposited in shallow basins. This preliminary curve was then combined with data derived from fossils and paleogeographic simulations, visualizing the distribution of land and sea during different geological periods. The scientists were also able to estimate the location and volume of continental ice caps based on Earth's changing climate over time and the position of the continents in relation to the poles. Sea levels were relatively low during the first 400 million years, reflecting the cooler climate and low tectonic activity. During the Carboniferous (358-298 million years ago) there were very large sea level variations due to a large ice cap covering a large landmass in — called Gondwana by geologists — the southern hemisphere. During the Cretaceous (145-66 million years ago) the supercontinent of Pangaea started to break up and the hothouse climate caused the poles to be ice free. These two effects resulted in global sea levels being more than 200 meters higher than they are at present. In the last 60 million years Earth started to cool down and around 30 million years ago the first ice sheets started to form on the poles. In the past 2 million years during the last major ice ages sea levels dropped up to 100 meters. The climate study, "A 485-million-year history of Earth's surface temperature," was published in the journal Science and can be found online here. The sea level study, 'Phanerozoic orbital-scale glacio-eustatic variability,' was published in the journal Earth and Planetary Science Letters and can be found online here. Additional material and interviews provided by University of Utrecht.
Yahoo
11-07-2025
- Business
- Yahoo
Homes in Chemung County sold for higher prices recently: See how much here
Newly released data from for April shows that potential buyers and sellers in Chemung County saw higher home sale prices than the previous month's median of $118,000. The median home sold for $157,450, an analysis of data from shows. That means April, the most recent month for which figures are available, was up 33.4% from March. Compared to April 2024, the median home sales price was the same as last year. sources sales data from real estate deeds, resulting in a few months' delay in the data. The statistics don't include homes currently listed for sale and aren't directly comparable to listings data. Information on your local housing market, along with other useful community data, is available at Here is a breakdown on median sale prices: Looking only at single-family homes, the $159,950 median selling price in Chemung County was up 35.6% in April from $118,000 the month prior. No single-family homes sold for $1 million or more during the month. Across New York, homes sold at a median of $488,992 during April, down 4.1% from $510,000 in March. There were 9,825 recorded sales across the state during April, down 5.4% from 10,386 recorded sales in April 2024. Here's a breakdown for the full state: The total value of recorded residential home sales in New York decreased by 21% from $10 billion in March to $7.9 billion this April. Out of all residential home sales in New York, 16.47% of homes sold for at least $1 million in April, up from 15.12% in April 2024. Sales prices of single-family homes across New York decreased by 2.8% from a median of $450,000 in March to $437,255 in April. Since April 2024, the sales price of single-family homes across the state was up 4.1% from $420,040. Across the state, the sales price of condominiums and townhomes dropped 6.3% from a median of $629,892 in March to $590,036 during April. The median sales price of condominiums and townhomes is up 5.4% from the median of $560,089 in April 2024. The median home sales price used in this report represents the midway point of all the houses or units listed over the given period of time. The median offers a more accurate view of what's happening in a market than the average sales price, which would mean taking the sum of all sales prices then dividing by the number of homes sold. The average can be skewed by one particularly low or high sale. The USA TODAY Network is publishing localized versions of this story on its news sites across the country, generated with data from Please leave any feedback or corrections for this story here. This story was written by Ozge Terzioglu. Our News Automation and AI team would like to hear from you. Take this survey and share your thoughts with us. This article originally appeared on Elmira Star-Gazette: Homes in Chemung County sold for higher prices recently: See how much here
