mspelto

mspelto

36p

18 comments posted · 0 followers · following 0

229 weeks ago @ Jewish Daily Forward - Why Did Nate Silver Na... · 2 replies · +6 points

The problem is that Roger Pielke Jr. is neither a scientist or a skilled statistician, so what can he bring to the table, besides a point of view. If five thirty eight is interested in an opinion that is fine, if they want an expert analysis that is not.

286 weeks ago @ Council on Hemispheric... - The Andean Glaciers: F... · 0 replies · +1 points

Zongo Glacier is a good example from Bolivia. Artesonraju Glacier in Peru also. In Chile Nef Glacier exemplifies impacts on hydropower.

426 weeks ago @ Collide-a-scape - Our Uncivil Climate (D... · 0 replies · +2 points

What I look forward to in attending science meetings is the chance to discuss a topic with several scientists each with a different expertise. It is this dialog that is most valuable and has the best chance to offer new insight. Thus, a blog article that examines an issue but from several disparate angles is most interesting. This means no single blog author it is a give and take in the interpretation of the data or paper in question by several blog authors. The above post discussion somewhat fits this, but is not really examining science directly.

426 weeks ago @ Hot Topic - It's grim up North #2 · 0 replies · +1 points

You did not imply the lakes were a new feature, just wanted that point to be clear. If you crudely overlay the 2009 image of the Jakobshavn and this 2010 image, I cannot see a noticeable retreat yet, the retreat is generally a summer function. I place them one above another in an updated post on the Jakobshavn . Match to the inland margin to the south of the main tongue.

426 weeks ago @ Hot Topic - It's grim up North #2 · 1 reply · +2 points

The meltwater lakes are not a new feature of the GIS. Working on the Jakobshavn in the 1980's and completing a paper using lots of aerial shots from before then indicate the long term presence of the lakes. What is interesting in your image, is that this is early June and the lakes are largely uncovered and the snowline is quite high for this time of the year. This indicates the melt season is more advanced than usual.

427 weeks ago @ Hot Topic - My white ice cycle · 1 reply · +2 points

Nice work this brings us back to the issue of a paper I reviewed and was published a year ago on the The emergence of surface-based Arctic amplification (Sereeze and others, 2009) This is largely a fall function and reinforces temperature induced sea ice loss. They explain your idea of the fall maximum anomaly well.

428 weeks ago @ Hot Topic - Whose lie is it anyway... · 0 replies · +1 points

Thanks Glacier Guy for the support. I just wanted to point out the work involved in getting the pictures and measuring the actual retreat of Boulder Glacier . In 1988 a mini-lahar forced us to rapidly flee the terminus area, my camera did not make it, no pics from that year. Did mark the terminus position well. In 1993 one of our four team members was in tears the hike in was so brutal, with the downed trees, heat and bugs on the unmaintained trail. The 1998 picture it snow and rained all day, of course we were wet from the brush before even reaching the glacier. In 2003 the conditions were nice and there were no complaints. No quick download to be had in this fieldwork.

428 weeks ago @ Hot Topic - Whose lie is it anyway... · 1 reply · +4 points

I dug through my email this morning look for dbunny and not Easterbrook and found one from 2007. I have supervised two of Easterbrook's students in the 1990's, though I never met Don. Joel Harper was one of them, who is an excellent glaciologist today. Anyway in looking through his presentations I see both pictures I have taken and data I have published uncited. The emails show that Don was well aware of both the pictures sources and citations for the data, but felt it imprudent to cite my work, which would shine a different light on the reason for glacier change in the North Cascade region . Below is the entire email, the top part is my reply, the bottom is inquiry. He did reply thanking me for the response.
To :D on Bunny [dbunny14@yahoo.com]
Don: Good to hear from you. It was a treat visiting and teaching Joel about glaciers in visiting the Mount Baker glaciers in 1990. I have continued to measure the mass balance of two mount Baker glaciers, surface elevations on three and terminus positions on all of them. I have published the results in three key articles.

Pelto, M.S. 2006. The current disequilibrium of North Cascade Glaciers. Hydrologic Processes, 20, 769-779.

Pelto, M.S. and P.L.Hartzell, 2004: Change in longitudinal profile on three North Cascades glaciers during the last 100 years. Hydrologic Processes 18, 1139-1146.

Pelto, M.S. and C. Hedlund, 2001: The terminus behavior and response time of North Cascade glaciers. J. Glaciol. 47, 497-506

The website has the information updated to the present.

You will have to give me more information about the conference. May is a tough time with the end of the semester coming then. But I would be happy to work on something with you either way.

Mauri
-----Original Message-----
From: Don Bunny [mailto:dbunny14@yahoo.com]
Sent: Mon 1/15/2007 4:34 PM
To: Pelto, Mauri S
Cc:
Subject: Mt Baker glaciers

Hi Mauri,

While in the process of compiling photos of Mt. Baker glaciers to extend the 1943-1990 data that Joel Harper and I put together some years ago, I stumbled upon your website and was pleasantly surprised to see how much work you have done. Obviously, you have already done what I was in the midst of doing!

I've grew up tromping around Mt. Baker (since about 1940) and began geologic work there in ~1957, focusing mostly on Pleistocene and Holocene glacial fluctuations and tephra/lahar chronology. Baker glaciers were in sharp retreat as I was growing up, then began to advance when I started working there. This was apparent on air photos and one of my grad students (Joel Harper) and I were able to document changes from 1943 to 1990 on most of the glaciers, plus sporadic notes dating back to ~1900. After many years of coring tress on moraines, I'm presently preparing a manuscript on LIA fluctuations and modern changes. Rather than 'reinventing the wheel' I'd like to cite your work on glacier margins 1990-2006. Is this data published or can I cite your webpage?

This spring (May), the Cordilleran section of GSA will meet in Bellingham and I'm hosting a symposium on Glaciation of Washington, including Holocene glacier fluctuations up to 2006. I'd like to invite you to present a paper in the symposium (or alternatively, join with me in presenting the fluctuations of Mt. Baker glaciers during the past century).

With all best wishes,

Don J. Easterbrook

428 weeks ago @ Hot Topic - Whose lie is it anyway... · 1 reply · +5 points

Gareth nice work keeping the pressure on. Two more deceptive points I note 1) If you look at his most recent publication on his page-Climate Cycle Evidence- you will note pictures of Boulder and Easton Glacier taken from the ground attributed to John Scurlock who takes gorgeous aerial photographs not ground photographs. These ground photographs I took and he has redrawn, though correctly the terminus margins I have drawn in, and applied the retreat rates I have published for both glaciers. These two pictures are well travelled and published in many places and generally properly attributed, so I think he knows I took them. , NCGCP. . or maybe he took them from this page NCGCP retreat.. or maybe on Boulder Glacier here Glacier Perspectives He does not want to cite me thank goodness, as the paper the data is in talks about the current disequilibrium of North Cascade glaciers with the current warm climate. The second point is if you look at his journal pubs list you will note that none of the recent ones 2003-present are. They are abstracts for conferences which of course are not peer reviewed and printed as written without comment or edting by the meeting.

428 weeks ago @ Hot Topic - In the Shadow of Melti... · 0 replies · +1 points

Bryan I wrote a chapter on glaciers and hydropower for the upcoming Encyclopedia of Snow and ice, this site was one of the many interesting stories, that I found that could not be delved into a summary science article.