Nter (2015), Toolik LTER (http:dx.doi.org10.6073pasta2f655c865f42136611b2605ae778d275), and Zackenberg (http:www.data.g-e-m.dk)up by Walker et al. (1989) at Toolik Lake and nearby Imnavait Creek. This monitoring was a part in the International Tundra Experiment (ITEX). Guay et al. (2014) analyzed satellite data to decide annual dynamics of normalized-difference vegetation index (NDVI), a measure of plant productivity, that is also extremely correlated with aboveground biomass in arctic systems (Boelman et al. 2003; Raynolds et al. 2012). The NDVI information have been derived in the GIMMS-AVHRR occasions series, version 3 g (Pinzon and Tucker 2014), having a 0.07o (8 km) spatial resolution. We analyzed the GIMMS-3 g dataset across the years 1982014 for any 40-km (20 km radius) area surrounding the Toolik Field Station. Seasonal periods of NDVI trends by means of time were consistent with all the seasonal periods applied to assess trends in air temperature (see legend for Fig. three).Results Climate trends: Arctic, North Slope of Alaska, Toolik, and Zackenberg Over the entire Arctic, the average SAT for the past century enhanced by about 0.09 per decade; sincethe mid 1960s that price has improved to 0.4 per decade (ACIA 2005). The North Slope of Alaska has warmed even more rapidly than the rest of the Arctic during the past few decades; Shulski and Wendler (2007) report a rise of more than three over the past 60 years or 0.5 per decade. The coastal town of Barrow, some 310 km northwest in the Toolik website, has warmed significantly (p\0.01) over the final 60 years with a temperature improve of three.1 or 0.five per decade (Fig. 2) (Alaska Climate Analysis Center 2015). In contrast for the Arctic and North Slope trends, a linear trend analysis with the Toolik datasets revealed no significant trend (p[0.05) inside the 25-year record of SAT from 1989 to 2010 (Cherry et al. 2014) or in SAT from 1989 to 2014 (Fig. two). This inability to detect a substantial trend (p[0.05) for these dates also occurred for the Barrow record for exactly the same short period (Fig. 2). The lack of substantial warming is also apparent within a closer analysis with the Toolik record for winter, spring, summer season, and fall (Fig. three). In contrast, the Zackenberg annual air temperatures plus the summer temperatures (Figs. 2, three) show a considerable (p\0.01) warming. Schmidt et al. (2012) report that more than the 1997008 period, the measured average summer temperature improved considerably resulting in an increase of amongst 1.eight and two.7 per decade (p\0.01), whileThe Author(s) 2017. This short article is published with open access at Springerlink.com www.kva.seenSAmbio 2017, 46(Suppl. 1):S160Fig. 3 Seasonal implies of Toolik LTER SAT 1988014 for winter (October 1 pril 30), spring (Could 1 une 15), summer time (June 16 ugust 15), and fall (August 16 eptember 30). Summer time data also include 1996014 indicates from Zackenberg (closed squares) from August 16 to September 30. Trend lines are linear regressions; only Zackenberg PubMed ID:http://www.ncbi.nlm.nih.gov/pubmed/21301389 summer season trends are significant (p \ 0.01). Data sources exact same as in Fig.precipitation data show no considerable trends for annual averages or for summer time months. To extend the Zackenberg climate database, TA-02 supplier Hansen et al. (2008) applied data from a nearby meteorological station (established in 1958) and from elsewhere in Greenland to make a dataset and calculate a long-term enhance in average annual temperature for the period 1901005 of 1.39 (p\0.01) and for 1991005 of 2.25 (p\0.01); they mention that these trends are related to.