Temperature trends at the Mauna Loa observatory, Hawaii

Malamud, Bruce D.; Turcotte, D.; Grimmond, Sue

doi:10.5194/cp-7-975-2011

Cited by 17 publications

(11 citation statements)

References 16 publications

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“…Climate warming at high elevations in Hawaii is estimated at 0.27 K decade -1 since the mid-1970s (Giambelluca et al, 2008) and at the nearby Mauna Loa Observatory it was 0.21 K decade -1 (Malamud et al, 2011). At this point we cannot determine whether the fluctuations in the ice level at the terminal end of the cave and the frequent melting represent short-term variations or whether they indicate the beginning of a systematic retreat.…”

Section: Discussionmentioning

confidence: 93%

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Massive Ice Loss from the Mauna Loa Icecave, Hawaii

Pflitsch

Schörghofer

Smith³

et al. 2016

Arctic, Antarctic, and Alpine Research

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Section: Discussionmentioning

confidence: 93%

“…The temperature at the nearby Mauna Loa Observatory shows a trend of increasing temperature between 1977 and 2006 (Malamud et al, 2011). The rising temperatures suggest the ice retreat in the Mauna Loa Icecave may be due to climate warming.…”

Section: Discussionmentioning

confidence: 99%

Massive Ice Loss from the Mauna Loa Icecave, Hawaii

Pflitsch

Schörghofer

Smith³

et al. 2016

Arctic, Antarctic, and Alpine Research

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“…The data set used by Newman et al () comprises 30 years of maximum and minimum daily temperatures at the NOAA Mauna Loa Observatory on the Big Island, Hawaii, recorded from 1 January 1977 to 31 December 2006. These time series are extracted from high‐quality hourly temperature data measured at 2 m above ground level (Malamud et al, ). Data are freely available from NOAA Earth System Research Laboratory Global Monitoring Division (https://www.esrl.noaa.gov/gmd/dv/data/).…”

Section: Analysis Of Temperature and Precipitation Datamentioning

confidence: 99%

Unsurprising Surprises: The Frequency of Record‐breaking and Overthreshold Hydrological Extremes Under Spatial and Temporal Dependence

Serinaldi

Kilsby

2018

Water Resources Research

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Record‐breaking (RB) events are the highest or lowest values assumed by a given variable, such as temperature and precipitation, since the beginning of the observation period. Research in hydroclimatic fluctuations and their link with this kind of extreme events recently renewed the interest in RB events. However, empirical analyses of RB events usually rely on statistical techniques based on too restrictive hypotheses such as independent and identically distributed (i/id) random variables or nongeneral numerical methods. In this study, we propose some exact distributions along with accurate approximations describing the occurrence probability of RB and peak‐over‐threshold (POT) events under general spatiotemporal dependence, which enable analyses based on more appropriate assumptions. We show that (i) the Poisson binomial distribution is the exact distribution of the number of RB events under i/id, (ii) equivalent binomial distributions are accurate approximations under i/id, (iii) beta‐binomial distributions provide the exact distribution of POT occurrences under spatiotemporal dependence, and (iv) equivalent beta‐binomial distributions provide accurate approximations for the distribution of RB occurrences under spatiotemporal dependence. To perform numerical validations, we also introduce a generator of spatially and temporally correlated binary processes, called BetaBitST. As examples of application, we study RB and POT occurrences for monthly precipitation and temperature over the conterminous United States and reanalyze Mauna Loa daily temperature data. Results show that accounting for spatiotemporal dependence yields strikingly different conclusions, making the observed frequencies of RB and POT events much less surprising than expected and calling into question previous results reported in the literature.

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“…There was an overall increase in annual mean air temperature by about 1°C since 1970. At the Mauna Loa Slope Observatory (MLO, 3397 m asl), the mean warming trend was 0.021°C/year in the period 1977–2006 (Malamud et al , ). Based on the temperature increase, the permafrost can be expected to be thawing, even if it was stable during Woodcock's observations.…”

Section: Introductionmentioning

confidence: 99%

State of High‐Altitude Permafrost on Tropical Maunakea Volcano, Hawaii

Schörghofer

Leopold

Yoshikawa

2017

Permafrost & Periglacial

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One of the most unusual occurrences of sporadic permafrost is on the summit plateau of Maunakea volcano on Hawaii Island, where permafrost was documented in two cinder‐cone craters in the 1970s. To investigate the state of this permafrost, we acquired multi‐year ground temperature data and conducted electrical resistivity and ground penetrating radar surveys. The two ice bodies still exist, but one has shrunk in volume by an order of magnitude and is expected to disappear soon. The other is still more than 50 m wide. We also prospected the summit region for additional permafrost bodies, based on insolation modelling, temperature probing and geomorphological indicators, but none was found. Permafrost occurs preferentially in the interiors of craters with a closed basin, even though there are exterior slopes that receive less solar radiation annually. Copyright © 2017 John Wiley & Sons, Ltd.

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Temperature trends at the Mauna Loa observatory, Hawaii

Cited by 17 publications

References 16 publications

Massive Ice Loss from the Mauna Loa Icecave, Hawaii

Massive Ice Loss from the Mauna Loa Icecave, Hawaii

Unsurprising Surprises: The Frequency of Record‐breaking and Overthreshold Hydrological Extremes Under Spatial and Temporal Dependence

State of High‐Altitude Permafrost on Tropical Maunakea Volcano, Hawaii

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