Dissolved iron measured along surface transects of the CARUSO-EISENEX experiment

Measurements of Fe(II) and H2O2 were carried out in the Atlantic sector of the Southern Ocean during EisenEx, an iron enrichment experiment. Iron was added on three separate occasions, approximately every 8 days, as a ferrous sulfate (FeSO4) solution. Vertical profiles of Fe(II) showed maxima consistent with the plume of the iron infusion. While H2O2 profiles revealed a corresponding minima showing the effect of oxidation of Fe(II) by H2O2, observations showed detectable Fe(II) concentrations existed for up to 8 days after an iron infusion. H2O2 concentrations increased at the depth of the chlorophyll maximum when iron concentrations returned to pre-infusion concentrations (<80 pM) possibly due to biological production related to iron reductase activity. In this work, Fe(II) and dissolved iron were used as tracers themselves for subsequent iron infusions when no further SF6 was added. EisenEx was subject to periods of weak and strong mixing. Slow mixing after the second infusion allowed significant concentrations of Fe(II) and Fe to exist for several days. During this time, dissolved and total iron in the infusion plume behaved almost conservatively as it was trapped between a relict mixed layer and a new rain-induced mixed layer. Using dissolved iron, a value for the vertical diffusion coefficient Kz=6.7±0.7 cm**2/s was obtained for this 2-day period. During a subsequent surface survey of the iron-enriched patch, elevated levels of Fe(II) were found in surface waters presumably from Fe(II) dissolved in the rainwater that was falling at this time. Model results suggest that the reaction between uncomplexed Fe(III) and O2? was a significant source of Fe(II) during EisenEx and helped to maintain high levels of Fe(II) in the water column. This phenomenon may occur in iron enrichment experiments when two conditions are met: (i) When Fe is added to a system already saturated with regard to organic complexation and (ii) when mixing processes are slow, thereby reducing the dispersion of iron into under-saturated waters.

1973 University of Michigan Baseball Team

Top Row: Chuck Rogers, Brian Balaze, Pat Sullivan, Ace Adams, Mike DeCou, Bill Meyer

Middle Row: Mark Weber, John Lieneck, Reggie Ball, Dan Damiani, Dick Walterhouse, Tom Kettinger, Jim Kocoloski, bat boy Jones

Front Row: Mark Crane, Pete Ross, Chris Burak, John Lonchar, Craig Forhan, Pete Helt, Tom Joyce, coach Moby Benedict

Wigwam wonder tales /

Ill. on lining paper.

Earth-motion measurements : [final report] /

"AEC Category: Nuclear explosions - peaceful applications; Military distribution category 14."

Camp site development.

Mode of access: Internet.

Zinc and lead deposits of southeastern Alaska.

Includes bibliographical references.

Pieces that have won prizes; also many encore pieces.

Encore pieces: An old man's soliloquy / Roswell Field -- A n old sweetheart of mine / James Whitcomb Riley -- And the band played / Maurice E. McLaoughlin -- The ballad of the colors ; Ben Bolt / Thomas Dunn English -- A brave little girl ; Casey at the bat / Anon -- The cataract of Lodore / Robert Southey -- The countersign was Mary / Margaret Eytinge -- Dinnis Kilboo's sanatarium / Chas. T. Catlin -- A dude in a horse-car / G.W. Kyle -- Elsinore / Lucy H. Hooper -- Entertaining sister's beau / Bret Harte -- Family financiering ; Farmer John ; Father's voice ; A fly's cogitations / Anon -- Foreign views of the statue / Fred. Emerson Brooks -- Going to school / Anon -- Grandma -- The granger and the gambler / W.H. -- A great tune / John Habberton -- Hail fellow, well met / Albert Hardy -- Hans and Fritz -- How girls study / Belle McDonald -- Jack the evangelist / N.Y. Evangelist -- The kitchen clock / J.V. Cheney -- Life's magnet / Ella Wheeler Wilcox -- The little boy's prayer / S.M. Talbot -- Little Nan -- Little orphant Annie / James Whitcomb Riley -- A little woman / Eugene Field -- Maud Rosihue's choice / T. Edwin Leary -- The mischievous misses / James G. Small -- Miss Maloney on the Chinese question / Mary M. Dodge -- Mrs. Stuart learns how to skate / Clara Augusta -- My lover / Emma Mortimer White -- My garden / Anon -- Nancy / Arty Brace -- Now and then / Anon -- O captain, my captain / Walt Whitman -- The old man in a palace car / John H. Yates -- The orthod-ox team / Fred Emerson Brooks -- The porter's story / Maurice Edmunds -- The proposal -- Romeo and Juliet / The Poet-Scout -- Room enough for all / Anon -- The saint and the sinner / Madeline Bridges -- Sam / Albert Hardy -- A schoolroom idyl / Charles B. Going -- A telephone message -- The countersign / J. Hooker Hamersley -- Uncle Ned's defense / Anon -- Unforgiven / Frank McHale -- The valentine / Mary D. Brine -- Wash dolly up like that / Eleanor Kirk Ames -- What is a gentleman / N.L. O'D -- The witness / Anon -- Yellow roses / J. Hooker Hamersley.

The well child : a Christmas offering to the children of St. Luke's church, Rochester /

Little Daniel, the good boy: who died in Springfield, Mass.: has separate t.-p.

Travels from Vienna through lower Hungary; with some remarks on the state of Vienna during the Congress, in the year 1814.

Plates after drawings by Bright engraved by Elizabeth Byrne, John Byrne, Lititia Byrne, H. Hobson, Samuel Middiman, Milton, John Pye, William Raymond Smith. Maps engraved by Sidney Hall. Wood-engraved head-pieces.

The Youth's companion.

Includes songs for solo voice with piano accompaniment.

Lettre ecrite a Mr. Calvet, conseiller medecin du Roy ... avec des observations sur la maladie de Marseille /

Mode of access: Internet.

The dramatic works of Colley Cibber, esq. in five volumes : volume the fifth.

Contiene: Cesar in Egypt ; Flora or Hob in the Well ; Scholl boy ; Xerxes ; Venus and Adonis ; Papal tyranny ; Damnon and Phillida.

The writings of Thomas Bailey Aldrich.

Vols. 1-2, 7-8; c1911.

The Red Cross girl /

At head of title: The novels and stories of Richard Harding Davis.

The collected works of W.H. Hudson.

--[15] The purple land; being the narrative of one Richard Lamb's adventures in the Banda Orientál in South America, as told by himself.--[16] A shepherd's life; impressions of the South Wiltshire Downs.--[17] Adventures among birds.--[18] Far away and long ago; a history of my early life.--[19] Birds in town & village.--[20] Birds of La Plata.--[21] The book of a naturalist.--[22] A traveller in little things.--[23] A hind in Richmond Park.--[24] Dead man's plack, An old thorn, & Miscellenea.