Answer to: Is the Hubbard Glacier growing? Geology and Geophysics, Physical Growing again. The thing has been going backwards from the moment pakeha looked at it, and is no faster or slower now. Similar to Hubbard glacier is Brüggen Glacier in Chile in the southern hemisphere. The captain ofour ship, the Celebrity Millenium was great (a wonderful sense of humour). The Hubbard Glacier is the most famous growing glacier. This long‐term advance has a strong seasonal cycle with advance in winter to spring and retreat in summer to fall with oscillations as large as 100 to 200 m [Trabant et al., 1991; Ritchie et al., 2006]. [58] Support for this work was provided in part by U.S. National Science Foundation grant OPP‐0221307, by NASA grant NAG5‐13760, and by U.S. National Park Service grant G‐2276. Thank Karen M . The estimated accuracy of raw water depth measurements is on the order of 0.5 m. The bathymetry data were coregistered and logged with GPS data at 5 s intervals. Since measurements began in 1895, Alaska’s Hubbard Glacier has been thickening and steadily advancing into Disenchantment Bay. It’s a magnificent sight in any case. Physics, Solar See Alaska's Hubbard Glacier advancing 7 feet per day! Other data sources are high‐resolution (1:6000), low‐elevation vertical aerial photos that were acquired for the National Marine Fisheries Service (NMFS) as part of their study of seal populations on icebergs in Disenchantment Bay. U.S. Geological Survey, abgerufen am 21. Surface ice velocities near Gilbert Point determined from vertical aerial photos: (a) 7 June to 7 July, (b) 7 July to 14 August, (c) 14–16 August, and (d) 16–23 August. Glaciers growing on Glacier Peak, WA She is going home, to die. Today, most glaciers are slowly receding, with one notable exception. Yes, the glacier is gliding downhill on a lubricating film of liquid water, presumably from melted ice. Yellow lines indicate the location of the terminus on August 1, 1978, and on July 13, 2002. The image above, acquired by the Operational Land Imager (OLI) on Landsat 8, shows Hubbard Glacier on July 22, 2014.The image shows a close-up of the glacier’s terminus on that day. This shoal moraine succeeded in isolating the terminus from ocean water and channel currents, substantially reducing or eliminating submarine melting and calving losses, allowing the fjord to be closed. Can’t they just blow up Gilbert point and save the fishing industry? March, and D.S. @Philip Bradley [54] Complicating this prediction are ice flow instabilities. Water levels to rose 0.24 meters (0.8 feet) per day. /sarc The glacier is approximately 7 miles wide at its foot and 76 miles long. While glaciers in southern Alaska were advancing during the Little Ice Age, Hubbard Glacier underwent a dramatic retreat [Barclay et al., 2001]. We also obtained the NOS 1999 survey data (http://www.oceanservice.noaa.gov/dataexplorer/) surrounding Gilbert Point and derived a bathymetric baseline to compare to post‐2002 outburst data. As a consequence, upstream ice flow decelerated from 5 m d−1 to 1.5 m d−1, with flow diverging to either side of Gilbert Point. Once moraine material is pushed above water in front of a seasonally advancing terminus, it will effectively isolate the ice front from the ocean and thereby shut down the calving and submarine processes, allowing the glacier to advance unabated. All that summer, the new lake filled with runoff; its water level rose 25 metres (82 ft), and the decrease in salinity threatened its sea life. There needs to be a more comprehensive monitoring of “all” glaciers of the globe. Photo by Bill Lucey, U.S. Forest Service. Our analysis was restricted to the regions close to Gilbert Point covering an area of about 3 km2 (Figure 2). These speeds were quite high, ranging from 12 to 4 m d−1 in a N – S gradient Given that ice thickness within 1 km of the terminus was likely 200 to 400 m [Trabant et al., 1991], most (≥ 90 %) of the measured surface ice velocity must be attributable to basal sliding. Isn’t that how climate-science-by-press-release works? Although we do not discount seasonal changes in ice speed as contributing to seasonal oscillations of the terminus position, we believe that the threefold increase in seasonal submarine thermal erosion could also reasonably explain the seasonal changes in terminus through increased submarine melting and calving. Based on the current rate of advance at the gap, Stearns estimated that closure could occur by 2043. Similar seasonal temperature changes of seawater correlated with seasonal changes in terminus position have been observed at LeConte Glacier [Motyka et al., 2003], at Columbia Glacier [Walters et al., 1988], and at other Alaskan fjords and bays with tidewater glaciers [e.g., Hooge and Hooge, 2002]. Dashed (solid) line shows glacier boundary from the first (second) photo date in each plot. There is something in nature on this planet that the “experts” don’t blame on the magic molecule CO2. So you have the cojones to say that peer-reviewed science and all the worlds institutions of Science, which conclude AGW, are institutions of Religion, and YOU, an avowed rejecter of their findings, represent SCIENCE? Another nail in the CAGW coffin. Furthermore, the glacier has an accumulation area that extends to very high altitudes and there are some indications of recent increased precipitation rates at high altitudes on nearby Variegated Glacier [Eisen et al., 2001]. A lot. Image of gray, alaskan, climate - 153519917 The last of these has implications for the future behavior of the glacier. ‘Peer-reviewed’ distinguishes scientists from those that aren’t but think they are. They don’t seem to include some of the largest advancing glaciers in the world. And we’re still awaiting Anthony’s paper on data treatment. If you do not receive an email within 10 minutes, your email address may not be registered, A handful of Alaska glaciers are advancing and a few of those are getting bigger, but those are the exceptions. 3 km3 of water flushed through the gap in a period of about 30 hours. @evanmjones The mainstream media seems to have somehow missed this. (1896-1977), Chinese Journal of Geophysics (2000-2018), International Introduction [2] Hubbard Glacier, located near Yakutat, Alaska (), is the largest nonpolar tidewater glacier in the world and has advanced over 2.5 km during the last century.This advance has now brought the terminus close to Gilbert Point at the entrance to 60‐km‐long Russell Fjord ().Hubbard Glacier has dammed Russell Fjord twice in historic times, once in 1986 and again in 2002. November 13, 2020 . A Greenland glacier is growing. Based on the current rate of advance at the gap, Stearns estimated that closure could occur by 2043. [41] As the moraine moved forward and began colliding with Gilbert Point, the boundary conditions for upstream ice changed appreciably. The flood waters rapidly eroded sediments and ice causing the channel to widen to 230 m and deepen to as much as 60 m bsl. We take the characteristic length to be ∼1 km, the approximate distance from the sill to Osier Island where the channel is the narrowest and currents strongest, and where past closures have occurred (Figure 8). Growing again. Any queries (other than missing content) should be directed to the corresponding author for the article. The collision of an advancing glacier with a rock wall is a rarely witnessed event, much less documented and quantified. After 1986, the channel gradually filled in with sediments derived from glacier erosion and remobilization of sediments by glacier advance. These concerns all seem so silly. The proper spelling is sceptic. Hubbard advanced to within 70 m of Gilbert Point in July 2011. Instead, flood waters from intense rains rapidly eroded the dam and submarine sediments, widening and deepening the channel. Alaska's Hubbard Glacier advancing 7 feet per day! Some good news from the thin ice. The moraine at the front gives the glacier stability and allows it to advance more easily because the ice does not need to be as thick to stay grounded. I always wondered with all the talk about Global warming; we better took a look at it before it disappears. (c) Channel depths immediately following 2002 outburst flood. Hubbard Glacier is up to 65 meters (213 feet) wide at its face and 50 meters (164 feet) tall, but that’s only the tiniest piece of the ice: The main channel of this frozen river begins 122 kilometers (76 miles) back, pouring down from the shoulder of Mt. If you’re wondering what the largest glacier in Alaska is, you got it. ALASKA’S HUBBARD GLACIER IS STILL ADVANCING, BUT AT A SLOWER PACE. I believe your position is not intellectually tenable. OMG! U.S. Geological Survey (2002, June 18) Advancing Glacier Coming Close to Blocking Fiord Near Yakutat, Alaska. (There are also reports that it is loosing mass). If we assume a conservative value of ∼3 m s−1 for the daily average tidal current through the gap, and use the average of the two values for melt rate from Figure 13, we find that melt rates in the channel could range from a low of 1.3 m d−1 in early spring (3°C) to as much as 4.5 m d−1 in late summer (10°C), compared to average ice velocity of about 5 m d−1 along this section of the terminus. Witnessed on the Radiance of the Seas 8/7/2010. No need for “the warmist” to worry. Lovely plumage! Hubbard Glacier, located in southeast Alaska, has an intriguing history; it retreated during the Little Ice Age when neighboring glaciers advanced and is currently advancing while neighboring glaciers recede [Barclay et al., 2001; Trabant et al., 2003; McNabb and Hock, 2014]. In terms of a closure, the advanced position of the glacier around Gilbert Point indicates that if a closure is to occur in the future the mechanism will be significantly different than previous closures (1986, 2002).” http://www.wgms.ch/gmbb.html, Gary, I think WGMS just changed their web address. One estimate suggests that the fjord could permanently close by 2025. [11] The water level record for “Russell Lake” was obtained from the U.S. Geological Survey (USGS) who operated a standard water level type tide gauge located in the “lake”. It almost seems like they were poking a stick at the settled science crowd. [1991] reported near terminus ice thickness of about 140 m with the bed ∼85 m bsl. September 16, 2013 – HUbbard Glacier Update It was not possible to coidentify features on the 2 May and 7 June photos because of snow cover. At Gilbert Point (Figure 2) it significantly affected upstream ice flow and stability of the glacier dam itself. The mighty Hubbard – the continent’s biggest tidewater glacier covering 1,350 square miles and standing 350 feet tall – is growing larger by the day. (d) Channel depths 2 years after outburst. In 2002, Stearns was attending a glaciology conference in nearby Yakutat, Alaska, a town that depends on Russell Fjord’s marine life. Fortunately, the Hubbard Glacier is growing in size which is so great environmentally. Oceanography, Interplanetary Water level began rising in the newly forming “Russell Lake”. What a lie! Lastly, understanding the dynamics in this region is important for assessing the factors facilitating another closure, the timing of the next closure, and the stability of any future dams. Dynamic Changes at Yahtse Glacier, the Most Rapidly Advancing Tidewater Glacier in Alaska. The captain ofour ship, the Celebrity Millenium was great (a wonderful sense of humour). (Speaking of which, I visited the glaciers in NZ, which are retreating alarmingly. Hubbard Glacier: Growing not Shrinking - See 659 traveler reviews, 1,105 candid photos, and great deals for Alaska, at Tripadvisor. Here’s later reports, I looked at the list of WGMS glaciers (the last 3 reports) included in the total glacial mass balances. [25] By July, speeds decelerated by a factor of two or more throughout the study area: 5–6 m d−1 into EDB and 1.5 m d−1 toward Gilbert Point (Figure 7b). Glacier and moraine boundaries from preceding photo are shown by dashed line. Knowledge of water depths is also essential for assessing stability of ice dams because ice flotation can trigger subglacial release of jökulhlaups [Björnsson, 1992, 2002; Roberts, 2005]. (2015) Glaciological and marine geological controls on terminus dynamics of Hubbard Glacier, southeast Alaska. Ice thickness increases to 800 m and bed depth drops to 400 m bsl at 3 km. Commentary by Jeffrey Simpleton warrenlb, please try and compose a comment that doesn’t involve the words ‘peer reviewed’. The aerial photos included the glacier terminus and were taken periodically from early May through August including during and immediately after the outburst flood. If you are ever there take a camera with a panoramic function as it is very wide. [16] Bathymetric surveys of the area were conducted by the National Ocean Survey (NOS) in 1977–1978 [NOAA, 1984] and 1999 [NOAA, 2000].