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3 results for “early 2000s”
A dataset of late 1990s and early 2000s web banner ads on Chinese- and English-language web pages
<p>This dataset contains information about 22,915 unique banner ad images appearing on Chinese- and English-language web pages in the late 1990s and early 2000s. The dataset is mined from 1,384,355 archived web page snapshots downloaded from the Wayback Machine, representing 77,747 unique HTTP URLs. The URLs are collected from six printed Internet directory books published in mainland China and the United States between 1999 and 2001, as part of a larger research project on Chinese-language web archiving.</p> <p><br> For each banner ad image, the dataset provides standard image metadata such as file format and dimension. The dataset also provides the original URLs of the web pages where the banner ad image was found, timestamps of the archived web page snapshots containing the image, archived URLs of the image file, and, if available, archived URLs of web pages to which the ad image is linked. Additionally, the dataset provides text data obtained from the banner ad images using optical character recognition (OCR). We expect the dataset to be useful for researchers across a variety of disciplines and fields such as visual culture, history, media studies, and business and marketing.</p>
Data from: Dryland soils in northern China sequester carbon during the early-2000s warming hiatus period
1. Drylands, covering ~45% of the Earth's terrestrial surface and supporting ~38% of the global population, play a dominant role in the trend and inter-annual variability of global land carbon (C) sink. Given that a large proportion of organic C is stored in soils, our knowledge on soil C dynamics in drylands is crucial to evaluate terrestrial C-climate feedback. However, credible understanding on this issue is still greatly limited by the lack of direct observations. 2. Here, based on a regional resampling of historical sites collected during 2002-2004, we explored the soil organic C changes in various layers over the past decade across the arid/semi-arid grasslands on the Inner Mongolian Plateau. 3. Our results revealed that the soil organic C density (SOCD) in this typical dryland increased significantly over the monitoring period, with a mean increase of 50.6 g C m-2 yr-1 or 0.8% yr-1 in the top 50 cm depth. Moreover, soil C dynamics exhibited contrasting spatial patterns between different layers: the rate of C accumulation in surface soils (0-10 cm) decreased, whereas that in deep soils (30-50 cm) exhibited an increasing trend along the aridity gradient. 4. Collectively, these findings demonstrate that dryland soils function as an important C sink, with the drier region tending to sequester C in deeper soils due to the greater root biomass allocation.
Data from: Dryland soils in northern China sequester carbon during the early-2000s warming hiatus period
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