Seasonal dating credit terms

Global surface temperature change for the period 1980–2004.The blue line is the monthly average, the black line is the annual average and the red line is the 5-year running average.

seasonal dating credit terms-37

Seasonal dating credit terms

In recent decades more extensive sampling of ocean temperatures at various depths have begun allowing estimates of ocean heat content but these do not form part of the global surface temperature datasets.

This gives a trend of 0.064 ± 0.015 °C per decade over that period.

Land use change like deforestation can increase greenhouse gases through burning biomass. Incoming solar radiation varies very slightly with the main variation being an approximately 11-year cycle.

Records of global average surface temperature are usually presented as anomalies rather than as absolute temperatures.

While record-breaking years can attract considerable public interest, individual years are less significant than the overall trend.

Some climatologists have criticized the attention that the popular press gives to "warmest year" statistics; for example, Gavin Schmidt stated "the long-term trends or the expected sequence of records are far more important than whether any single year is a record or not." Of the 20 records, Schmidt stated that the 2014–16 El Niño event was "a factor ...

Temperature anomalies are useful for deriving average surface temperatures because they tend to be highly correlated over large distances (of the order of 1000 km).

In other words, anomalies are representative of temperature changes over large areas and distances.

Deke Arndt leads the monitoring group at NOAA's National Centers for Environmental Information and offered an analogy in a report on NPR: "The long-term warming is a lot like riding up an escalator over time.

The longer you're on the escalator, the higher you go.

Land air temperatures are rising faster than sea surface temperatures.

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